python 一点flask框架加一点html在本地登录注册

下面是一个简单的本地登录注册示例，使用Python的Flask框架和简单的HTML。

首先，安装Flask：




pip install Flask

然后，创建以下代码：




from flask import Flask, render_template, request, redirect, url_for, session
 
app = Flask(__name__)
app.secret_key = 'your_secret_key'
 
users = {
    'admin': 'admin',
    'user': 'password'
}
 
@app.route('/')
def index():
    return render_template('index.html')
 
@app.route('/login', methods=['GET', 'POST'])
def login():
    if request.method == 'POST':
        username = request.form['username']
        password = request.form['password']
        if username in users and users[username] == password:
            session['username'] = username
            return redirect(url_for('home'))
        return 'Login Failed. Please try again.'
    return render_template('login.html')
 
@app.route('/register', methods=['GET', 'POST'])
def register():
    if request.method == 'POST':
        username = request.form['username']
        password = request.form['password']
        if username in users:
            return 'User already exists. Please login.'
        users[username] = password
        return redirect(url_for('login'))
    return render_template('register.html')
 
@app.route('/home')
def home():
    if 'username' in session:
        return 'Hello, ' + session['username']
    return redirect(url_for('login'))
 
if __name__ == '__main__':
    app.run(debug=True)

在同一目录下创建templates文件夹，然后在templates文件夹中创建以下HTML文件：

index.html:




<!DOCTYPE html>
<html>
<head>
    <title>Login</title>
</head>
<body>
    <h1>Welcome to the Local Login Registration Example</h1>
    <p>Please <a href="{{ url_for('login') }}">login</a> or <a href="{{ url_for('register') }}">register</a>.</p>
</body>
</html>

login.html:




<!DOCTYPE html>
<html>
<head>
    <title>Login</title>
</head>
<body>
    <h1>Login</h1>
    <form method="post">
        <input type="text" name="username" placeholder="Username" required>
        <input type="password" name="password" placeholder="Password" required>
        <input type="submit" value="Login">
    </form>
</body>
</html>

register.html:




<!DOCTYPE html>
<html>
<head>
    <title>Register</title>
</head>
<body>
    <h1>Register</h1>
    <form method="post">
        <input type="text" name="username" placeholder="Username" required>
        <input type="password" name="password" pl

python 一点flask框架加一点html在本地登录注册

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