python Flask框架CBV视图

1.演示之前需要先写一个装饰器

# 装饰器

def wrapper(func):

    def inner(*args, **kwargs):

        print('操作函数%s之前' % func.__name__)

        ret = func(*args, **kwargs)

        print('操作函数%s之后' % func.__name__)

        return func.__name__

    return inner

2.写一个CBV的例子

# 导入模块

from flask import Flask, views, url_for

app = Flask(__name__)

# 首页视图函数

@app.route("/")

def index():

    return "this is index page !"

# 登录视图类,继承MethodView

class Login(views.MethodView):

    # 允许访问方式

    methods = ["GET", "POST"]

    # 路由装饰器,如有多个,列表方式展示

    # 顺序:列表从头到尾,装饰由内向外，一一对应

    decorators = [wrapper, ]

    # 处理GET请求

    def get(self):

        print(url_for("my_login"))

        return 'this is login page ！'

    # 处理POST请求

    def post(self):

        return "Successful!"

# 文章视图类,继承MethodView

class Articles(views.MethodView):

    methods = ["GET", "POST"]

    decorators = [wrapper, ]

    # 处理文章GET请求

    def get(self):

        print(url_for('articles'))

        return 'this is articles list ！'

    # 处理文章POST请求

    def post(self):

        return "Add Successful !"

# 登录页面

app.add_url_rule("/login", endpoint=None, view_func=Login.as_view("my_login"))

# 文章页面

app.add_url_rule("/articles", endpoint=None, view_func=Articles.as_view("articles"))

if __name__ == '__main__':

    app.run('127.0.0.1', 5005, debug=True)