Django4全栈进阶之路18 项目实战：登录模块设计-526互联

1、编写函数视图，判定用户名密码，验证通过进入home主页，不通过返回登录页面

def login_view(request):
    if request.method == 'POST':
        username = request.POST.get('username')
        password = request.POST.get('password')
        print(username)
        print(password)
        user = authenticate(request, username=username, password=password)
        if user is not None:
            print(user)
            login(request, user)
            return redirect('home')
        else:
            error_message = 'Invalid username or password'
            return render(request, 'login.html', {'error_message': error_message})
    else:
        return render(request, 'login.html')

2、创建路由

from django.urls import path

from . import views

urlpatterns = [
    path('login/', views.login_view, name='login'),
]

3、前端模板

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Login Window</title>
    <!-- 引入 Bootstrap 和 jQuery -->
    <link rel="stylesheet" href="https://cdn.bootcdn.net/ajax/libs/twitter-bootstrap/4.6.2/css/bootstrap.min.css">
    <script src="https://cdn.bootcdn.net/ajax/libs/jquery/3.6.0/jquery.min.js"></script>
    <script src="https://cdn.bootcdn.net/ajax/libs/twitter-bootstrap/4.6.2/js/bootstrap.min.js"></script>
    <style>
        /* 将登录窗口置于页面中心位置 */
        .login-wrapper {
            display: flex;
            justify-content: center;
            align-items: center;
            height: 100vh;
        }

        /* 登录窗口样式 */
        .login {
            width: 300px;
            padding: 20px;
            border: 1px solid #ccc;
            border-radius: 5px;
        }

        .form-group {
            margin-bottom: 10px;
        }

        label {
            display: block;
            margin-bottom: 5px;
        }

        input[type="text"],
        input[type="password"] {
            width: 100%;
            padding: 5px;
            border: 1px solid #ccc;
            border-radius: 3px;
        }

        button {
            display: block;
            width: 100%;
            padding: 5px;
            margin-top: 10px;
            background-color: #007bff;
            color: #fff;
            border: none;
            border-radius: 3px;
            cursor: pointer;
        }

        button:hover {
            background-color: #0069d9;
        }
    </style>
</head>
<body>
<div class="login-wrapper">
    <div class="login">
        <h2>登录</h2>
        <hr>
        {% if error_message %}
            <div class="alert alert-danger">{{ error_message }}</div>
        {% endif %}
        <form method="post" action="{% url 'login' %}">
            {% csrf_token %}
            <div class="form-group">
                <label for="username">用户名</label>
                <input type="text" id="username" name="username" placeholder="Enter your username">
            </div>
            <div class="form-group">
                <label for="password">密码</label>
                <input type="password" id="password" name="password" placeholder="Enter your password">
            </div>
            <button type="submit">确认</button>
        </form>
    </div>
</div>
</body>
</html>