HTML-Code

        <!DOCTYPE html>
        <html lang="de">
        <head>
            <meta charset="UTF-8">
            <meta name="viewport" content="width=device-width, initial-scale=1.0">
            <title>Upload.gh.de</title>
            <link rel="stylesheet" href="static/style.css">
        </head>
        <body>
            <div class="navbar">
                <div class="navbar-left">
                    <a href="#">Upload File</a>
                </div>
                <div class="navbar-right">
                    {% raw %}{% if username %}{% endraw %}
                        <span>Willkommen, {{ username }}</span> | <a href="logout">Logout</a>
                    {% raw %}{% else %}{% endraw %}
                        <a href="login">Login</a> | <a href="register">Register</a>
                    {% raw %}{% endif %}{% endraw %}
                </div>
            </div>
            <div class="container">
                <h2>Datei hochladen</h2>
                <form action="upload" method="post" enctype="multipart/form-data">
                    <input type="file" name="file" required><br>
                    <input type="text" name="description" placeholder="Beschreibung" required><br>
                    <input type="text" name="manual" placeholder="Bedienungsanleitung"><br>
                    <input type="text" name="file_password" placeholder="Passwort für die Datei"><br>
                    <input type="checkbox" onclick="showPassword()"> Passwort anzeigen<br>
                    <button type="submit">Hochladen</button>
                </form>
            </div>
            <script>
                function showPassword() {
                    var x = document.getElementsByName('file_password')[0];
                    if (x.type === 'password') {
                        x.type = 'text';
                    } else {
                        x.type = 'password';
                    }
                }
            </script>
        </body>
        </html>