python用装饰器自动注册Tornado路由详解

#!/usr/bin/env python
# _*_ coding:utf-8 _*_

# Created by 安生 on 2017/2/9

import tornado
import tornado.web
import tornado.ioloop

class RouterConfig:
 def __init__(self):
  self.Application = tornado.web.Application() # 创建路由对象

 def route(self, handler):
  self.Application.add_handlers('.*$', [(handler.URL, handler)]) # 路有关系映射添加到路由表中

app = RouterConfig() # 创建路由

@app.route
class MainHandler(tornado.web.RequestHandler):
 URL = r'/'

 def get(self, *args, **kwargs):
  self.write('Hello, 安生')

@app.route
class MainHandler(tornado.web.RequestHandler):
 URL = r'/hi'

 def get(self, *args, **kwargs):
  self.write('hi, 安生')

if __name__ == "__main__":
 app.Application.listen(8000)
 print("http://127.0.0.1:8000/")
 tornado.ioloop.IOLoop.instance().start()

#!/usr/bin/env python
# _*_ coding:utf-8 _*_

# Created by 安生 on 2017/2/9

import tornado.ioloop
import tornado.web

class Route(object):
 """ 把每个URL与Handler的关系保存到一个元组中，然后追加到列表内，列表内包含了所有的Handler """

 def __init__(self):
  self.urls = list() # 路由列表

 def __call__(self, url, *args, **kwargs):
  def register(cls):
   self.urls.append((url, cls)) # 把路由的对应关系表添加到路由列表中
   return cls

  return register

route = Route() # 创建路由表对象

@route(r'/')
class MainHandler(tornado.web.RequestHandler):
 def get(self, *args, **kwargs):
  self.write('Hello, 安生')

@route(r'/hi')
class MainHandler(tornado.web.RequestHandler):
 def get(self, *args, **kwargs):
  self.write('hi, 安生')

application = tornado.web.Application(route.urls) # 创建app，并且把路有关系放入到Application对象中

if __name__ == '__main__':
 application.listen(8000)
 print("http://127.0.0.1:%s/" % 8000)
 tornado.ioloop.IOLoop.instance().start()

#!/usr/bin/env python
# _*_ coding:utf-8 _*_

# Created by 安生 on 2017/2/9

import tornado.web
import tornado.ioloop

class RouterConfig(tornado.web.Application):
 """ 重置Tornado自带的路有对象 """

 def route(self, url):
  """
  :param url: URL地址
  :return: 注册路由关系对应表的装饰器
  """

  def register(handler):
   """
   :param handler: URL对应的Handler
   :return: Handler
   """
   self.add_handlers(".*$", [(url, handler)]) # URL和Handler对应关系添加到路由表中
   return handler

  return register

app = RouterConfig(cookie_secret='ulb7bEIZmwpV545Z') # 创建Tornado路由对象，默认路由表为空

@app.route(r'/')
class MainHandler(tornado.web.RequestHandler):
 def get(self, *args, **kwargs):
  self.write('Hello, 安生')

@app.route(r'/hi')
class MainHandler(tornado.web.RequestHandler):
 def get(self, *args, **kwargs):
  self.write('hi, 安生')

if __name__ == "__main__":
 app.listen(8000)
 print("http://127.0.0.1:%s/" % 8000)
 tornado.ioloop.IOLoop.instance().start()

>>> import requests
>>> requests.get('http://127.0.0.1:8000/').text
'Hello, 安生'
>>> requests.get('http://127.0.0.1:8000/hi').text
'hi, 安生'