密码保护

1.更新User对象，设置对内的_password

class User(db.Model):

    __tablename__ = 'user' 

    _password = db.Column(db.String(200), nullable=False) #内部使用

class User(db.Model):
    __tablename__ = 'user'
    id = db.Column(db.Integer,primary_key=True,autoincrement=True)
    username = db.Column(db.String(20),nullable=False)
    _password = db.Column(db.String(200), nullable=False)  # 内部使用

2.编写对外的password

from werkzeug.security import generate_password_hash, check_password_hash

    @property

    def password(self):  #外部使用，取值

        return self._password

    @password.setter

    def password(self, row_password):#外部使用，赋值

        self._password = generate_password_hash(row_password)

 @property
    def password(self):  # 外部使用，取值
       return self._password

    @password.setter
    def password(self, row_password):  # 外部使用，赋值
       self._password = generate_password_hash(row_password)

3.密码验证的方法：

    def check_password(self, row_password): #密码验证

        result = check_password_hash(self._password,row_password)

        return result

    def check_password(self, row_password):  # 密码验证
           result = check_password_hash(self._password, row_password)
           return result

4.登录验证：

        password1 = request.form.get('password')

        user = User.query.filter(User.username == username).first()

        if user:

            if user.check_password(password1):

@app.route('/ll/',methods=['GET','POST'])
def ll():
    if request.method=='GET':
        return render_template('ll.html')
    else:
        username = request.form.get('username')
        password = request.form.get('password')
        user = User.query.filter(User.username == username).first()
        if user:
          if user.check_password(password):
            session['user']=username
            session['userid'] = user.id
            session.permanent=True
            return redirect(url_for('index'))
          else:
              return u'password error'
        else:
            return u'error username '