SecurityAndAuthentication/webform.html at main · Safe-app-eth/SecurityAndAuthentication · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>SafeVault - Secure Data Management</title>
    <style>
        body {
            font-family: Arial, sans-serif;
            max-width: 600px;
            margin: 50px auto;
            padding: 20px;
            background-color: #f5f5f5;
        }
        .form-container {
            background: white;
            padding: 30px;
            border-radius: 8px;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
        }
        .form-group {
            margin-bottom: 20px;
        }
        label {
            display: block;
            margin-bottom: 5px;
            font-weight: bold;
            color: #333;
        }
        input[type="text"], input[type="email"] {
            width: 100%;
            padding: 10px;
            border: 1px solid #ddd;
            border-radius: 4px;
            font-size: 16px;
            box-sizing: border-box;
        }
        input[type="text"]:focus, input[type="email"]:focus {
            outline: none;
            border-color: #4CAF50;
            box-shadow: 0 0 5px rgba(76, 175, 80, 0.3);
        }
        button {
            background-color: #4CAF50;
            color: white;
            padding: 12px 24px;
            border: none;
            border-radius: 4px;
            cursor: pointer;
            font-size: 16px;
            width: 100%;
        }
        button:hover {
            background-color: #45a049;
        }
        .error {
            color: #f44336;
            font-size: 14px;
            margin-top: 5px;
        }
        .success {
            color: #4CAF50;
            font-size: 14px;
            margin-top: 5px;
        }
    </style>
</head>
<body>
    <div class="form-container">
        <h1>SafeVault - User Registration</h1>
        <p>Secure data management with input validation and protection against common vulnerabilities.</p>

        <form id="userForm" action="/api/users" method="post">
            <div class="form-group">
                <label for="username">Username:</label>
                <input type="text" id="username" name="username" required>
                <div id="username-error" class="error"></div>
            </div>

            <div class="form-group">
                <label for="email">Email:</label>
                <input type="email" id="email" name="email" required>
                <div id="email-error" class="error"></div>
            </div>

            <button type="submit">Submit</button>
            <div id="form-message"></div>
        </form>
    </div>

    <script>
        // Client-side input validation
        document.getElementById('userForm').addEventListener('submit', function(e) {
            e.preventDefault();

            const username = document.getElementById('username').value;
            const email = document.getElementById('email').value;

            // Clear previous errors
            document.getElementById('username-error').textContent = '';
            document.getElementById('email-error').textContent = '';
            document.getElementById('form-message').textContent = '';

            let isValid = true;

            // Validate username
            if (!username || username.length < 3) {
                document.getElementById('username-error').textContent = 'Username must be at least 3 characters long';
                isValid = false;
            } else if (!/^[a-zA-Z0-9_]+$/.test(username)) {
                document.getElementById('username-error').textContent = 'Username can only contain letters, numbers, and underscores';
                isValid = false;
            }

            // Validate email
            const emailRegex = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
            if (!email || !emailRegex.test(email)) {
                document.getElementById('email-error').textContent = 'Please enter a valid email address';
                isValid = false;
            }

            if (isValid) {
                // Submit to server
                fetch('/api/users', {
                    method: 'POST',
                    headers: {
                        'Content-Type': 'application/json',
                    },
                    body: JSON.stringify({ username, email })
                })
                .then(response => response.json())
                .then(data => {
                    if (data.success) {
                        document.getElementById('form-message').textContent = 'User registered successfully!';
                        document.getElementById('form-message').className = 'success';
                        document.getElementById('userForm').reset();
                    } else {
                        document.getElementById('form-message').textContent = data.message || 'Registration failed';
                        document.getElementById('form-message').className = 'error';
                    }
                })
                .catch(error => {
                    document.getElementById('form-message').textContent = 'An error occurred. Please try again.';
                    document.getElementById('form-message').className = 'error';
                });
            }
        });
    </script>
</body>
</html>