Flask的路由系统
#!/usr/bin/env python
# -*- coding: utf-8 -*-
__author__ = ‘Wu‘
from flask import Flask
app = Flask(__name__)
# @app.route(‘/index‘)
def index():
return ‘Index‘
def login():
return ‘Login‘
app.add_url_rule(‘/index‘, ‘index‘, index, methods=[‘GET‘])
app.add_url_rule(‘/login‘, ‘login‘, login, methods=[‘GET‘])
if __name__ == ‘__main__‘:
app.run()
源码实现：
def _endpoint_from_view_func(view_func):
assert view_func is not None, ‘expected view func if endpoint ‘ ‘is not provided.‘
return view_func.__name__ # endpoint等于视图函数的名字
def add_url_rule(self, rule, endpoint=None, view_func=None, **options):
if endpoint is None: # 2. 如果endpoint为None
endpoint = _endpoint_from_view_func(view_func) # 3. endpoint等于。。。
options[‘endpoint‘] = endpoint
methods = options.pop(‘methods‘, None)
def route(self, rule, **options):
def decorator(f):
endpoint = options.pop(‘endpoint‘, None) # 1.如果不设置endpoint则为None
self.add_url_rule(rule, endpoint, f, **options) # flask路由的本质就是调用self.add_url_rule
return f
return decorator
CBV
Django中处理请求的方式有FBV和CBV两中，其实Flask中也支持CBV，它的CBV和Django的类似。