python的登陆认证及网页认证

思路
通过登陆---登陆通过将用户名称写入session--每个网页访问先认证用户是否在session中
flask登陆首页
from flask import Flask, render_template, request, redirect, url_for, session

app = Flask(__name__)
app.secret_key = 'your_secret_key_here'  # 设置秘密密钥以安全地处理会话

# 假设我们有一个简单的用户验证函数
def check_credentials(username, password):
    # 这里只是一个简化的模拟，实际应用中应连接到数据库进行查询
    if username == 'admin' and password == 'password':
        return True
    return False

@app.route('/')
def home():
    if 'username' in session:
        return "Welcome back, {}!".format(session['username'])
    return "You are not logged in. Please go to the login page."

@app.route('/login', methods=['GET', 'POST'])
def login():
    if request.method == 'POST':
        username = request.form.get('username')
        password = request.form.get('password')

        if check_credentials(username, password):
            session['username'] = username
            return redirect(url_for('home'))
        else:
            error_message = "Invalid credentials. Please try again."
    else:
        error_message = None

    return render_template('login.html', error=error_message)

@app.route('/logout')
def logout():
    # 清除会话数据
    session.pop('username', None)
    return redirect(url_for('home'))

if __name__ == '__main__':
    app.run(debug=True)
登陆的网页代码
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<form action="{{ url_for('login') }}" method="post">
  <label for="username">Username:</label>
  <input type="text" id="username" name="username">
  <label for="password">Password:</label>
  <input type="password" id="password" name="password">
  {% if error %}
    <p>{{ error }}</p>
  {% endif %}
  <button type="submit">Login</button>
</form>
</body>
</html>

　　

　　

posted @ 2024-01-12 17:55  苍茫宇宙  阅读(170)  评论(0)    收藏  举报