外设租赁系统，源码搭建,如何保护用户数据安全？

python 复制代码运行

from flask import Flask,render_template, request, redirect, url_for fromflask_sqlalchemy import SQLAlchemy app =Flask(__name__) app.config['SQLALCHEMY_DATABASE_URI']= 'sqlite:///rental.db' db = SQLAlchemy(app)class User(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)class Device(db.Model): id =db.Column(db.Integer, primary_key=True) name =db.Column(db.String(80), nullable=False)status = db.Column(db.String(10),nullable=False) classRental(db.Model): id =db.Column(db.Integer, primary_key=True) user_id =db.Column(db.Integer, db.ForeignKey('user.id'),nullable=False) device_id = db.Column(db.Integer,db.ForeignKey('device.id'),nullable=False) start_time = db.Column(db.DateTime,nullable=False) end_time = db.Column(db.DateTime,nullable=False)@app.route('/')def index(): returnrender_template('index.html')@app.route('/login',methods=['POST']) deflogin(): username =request.form['username'] password =request.form['password'] user =User.query.filter_by(username=username, password=password).first()if user: returnredirect(url_for('dashboard')) else:return '用户名或密码错误'@app.route('/dashboard')def dashboard(): returnrender_template('dashboard.html') if__name__ == '__main__':app.run(debug=True)