文田503：flask-login用户授权案例

admin · 发表于 2024-4-30 16:01:09

#Flask Web开发 (qq.com)

本案例为python用户授权案例，使用了flask-login和sqlite数据库实现

python app文件

# 安装 pip install Flask Flask-Login Flask-SQLAlchemy
# flasklogin.py
# sqlite 数据库；数据模型；bootstrap
from flask import Flask, render_template, redirect, url_for, request, flash
from flask_login import LoginManager, UserMixin, login_user, login_required, logout_user, current_user
from flask_sqlalchemy import SQLAlchemy
app = Flask(__name__)
app.config['SECRET_KEY'] = '20200808'
app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///login.db'
db = SQLAlchemy(app)
login_manager = LoginManager()
login_manager.init_app(app)
login_manager.login_view = 'login'
### 创建 User 模型
class User(UserMixin, db.Model):
id = db.Column(db.Integer, primary_key=True)
username = db.Column(db.String(80), unique=True, nullable=False)
password = db.Column(db.String(120), nullable=False)
### 创建数据库
db.create_all()
### 用户加载函数
@login_manager.user_loader
def load_user(user_id):
return User.query.get(int(user_id))
### 登录视图
@app.route('/', methods=['GET', 'POST'])
@app.route('/login', methods=['GET', 'POST'])
def login():
if request.method == 'POST':
username = request.form['username']
password = request.form['password']
user = User.query.filter_by(username=username, password=password).first()
if user:
login_user(user)
flash('登录成功！')
return redirect(url_for('fs'))
else:
flash('用户不存在Invalid credentials')
return render_template('login.html')
### 受保护的视图
@app.route('/user')
@login_required
def user():
return f'欢迎： {current_user.username}'
@app.route('/index')
# @login_required
def index():
return f'index 欢迎：'
@app.route('/fs')
@login_required
def fs():
return f'安全锋速欢迎：'
### 退出
@app.route('/logout')
@login_required
def logout():
logout_user()
return redirect(url_for('login'))
if __name__ == '__main__':
app.run(debug=True)

复制代码

模板文件：templates/login.htlml

<!DOCTYPE html>
<html>
<head>
<title>登录</title>
</head>
<body>
<h2>登录</h2>
<form method="post">
<input type="text" name="username" placeholder="用户名"><br>
<input type="password" name="password" placeholder="密码"><br>
<input type="submit" value="登录">
</form>
</body>
</html>

复制代码

admin · 发表于 2024-5-12 11:01:40

0512增加部分内容
登录模板文件ulgoin.html

{% extends 'base.html' %}
{% from 'bootstrap5/form.html' import render_form, render_field, render_form_row %}
{% block title %} edit note {% endblock title %}
{% block content %}
<h2>{{title}}</h2>
<form method='post'>
{{ render_form(form) }}
</form>
{% endblock content %}

复制代码

基础模板base.html

{% from 'bootstrap5/nav.html' import render_nav_item %}
{% from 'bootstrap5/utils.html' import render_messages %}
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<title>{{ title }}</title>
<link rel="icon" href="{{ url_for('static', filename='favicon.ico') }}">
{{ bootstrap.load_css() }}
<style>
pre {
background: #ddd;
padding: 10px;
}
h2 {
margin-top: 20px;
}
footer {
margin: 20px;
}
</style>
</head>
<body>
<main class="container">
{{ render_messages(container=False, dismissible=True) }}
{% block content %}{% endblock %}
</main>
<footer class="text-center">
{% block footer %}
<script>document.write(new Datetime().getFullYear())</script>
<a href="https://www.37ck.cn">37创客</a>
</small>
{% endblock %}
</footer>
{{ bootstrap.load_js() }}
</body>
</html>

复制代码

admin · 发表于 2024-5-1 16:44:17

# 安装 pip install Flask Flask-Login Flask-SQLAlchemy
from flask import Flask, render_template, redirect, url_for, request, flash
from flask_login import LoginManager, UserMixin, login_user, login_required, logout_user, current_user
from flask_sqlalchemy import SQLAlchemy
app = Flask(__name__)
app.config['SECRET_KEY'] = 'your_secret_key'
app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///login.db'
db = SQLAlchemy(app)
login_manager = LoginManager()
login_manager.init_app(app)
login_manager.login_view = 'login'
### 创建 User 模型
class User(UserMixin, db.Model):
id = db.Column(db.Integer, primary_key=True)
username = db.Column(db.String(80), unique=True, nullable=False)
password = db.Column(db.String(120), nullable=False)
### 创建数据库
# db.create_all()
### 用户加载函数
@login_manager.user_loader
def load_user(user_id):
return User.query.get(int(user_id))
### 登录视图
@app.route('/login', methods=['GET', 'POST'])
def login():
if request.method == 'POST':
username = request.form['username']
password = request.form['password']
user = User.query.filter_by(username=username, password=password).first()
if user:
login_user(user)
return redirect(url_for('protected'))
else:
flash('用户不存在Invalid credentials')
return render_template('login.html')
### 受保护的视图
@app.route('/protected')
@login_required
def protected():
return f'欢迎： {current_user.username}'
### 登出视图
@app.route('/logout')
@login_required
def logout():
logout_user()
return redirect(url_for('login'))
if __name__ == '__main__':
app.run(debug=True)

复制代码

login.html

<!DOCTYPE html>
<html>
<head>
<title>Login</title>
</head>
<body>
<h2>Login</h2>
<form method="post">
<input type="text" name="username" placeholder="Username"><br>
<input type="password" name="password" placeholder="Password"><br>
<input type="submit" value="Login">
</form>
</body>
</html>

复制代码

		自动登录	找回密码
密码			立即注册

文田503：flask-login用户授权案例

本帖子中包含更多资源