flask的cookie、session

cookie方式

1、保存cookie，通过response对象获取

response = redirect()

response = render_template()

response = Response()

response = make_response()

response = jsonify()

#通过对象调用方法

response.set_cookie(key,value,max_age)

2、获取，通过request对象获取

request.form.get()

request.args.get()

cookie也在request对象中

request.cookies.get(key)

3、删除，通过response对象删除。把浏览器的key=value删除

response = redirect()

response = render_template()

response = Response()

response = make_response()

response = jsonify()

#通过对象调用方法

reponse.delete_cookie(key)

 session方式

1、保存session值

session['uid']

2、获取session的值

session.get('uid')

3、删除session的值

del session['uid']

session.clear()

@user_bp.route('/login',methods = ['GET','POST'])
def login():
    if request.method == 'POST':
        username = request.form.get('username')
        password = request.form.get('password')
        users = User.query.filter_by(username=username).all()
        for user in users:
            flag = check_password_hash(user.password,password)
            if flag:
                # 1、cookie机制
                # response = redirect(url_for('users.index'))
                # response.set_cookie('uid',str(user.id),max_age=3600)
                # return response
                # 2、session机制，session当成字典使用
                session['uid'] = user.id
                return redirect(url_for('users.index'))
        else:
            return render_template('users/login.html',mag='用户名密码登陆有误')
    return render_template('users/login.html')


@user_bp.route('/')
def index():
    #1、cookie的获取方式
    # uid = request.cookies.get('uid',None)
    #2、session的获取方式 因为是字典形式 可以使用get
    uid = session.get('uid')
    if uid:
        user = User.query.get(uid)
        return render_template('users/index.html',user=user)
    else:
        return render_template('users/index.html')

@user_bp.route('/')
def logout():
    response = redirect(url_for('users.index'))
　　 #通过response对象的delete_cookie(key),key就是要删除的对象
    response.delete_cookies('uid')
    #删除session
    del session['uid']
    return respones