tornado

hello.py

"""__author__ = song"""
import os

import tornado.ioloop
import tornado.web
from tornado.options import define, options, parse_command_line
import pymysql

# 定义默认启动的端口为80
define('port', default=8080, type=int)

class MainHandler(tornado.web.RequestHandler):
    # 必须继承RequestHandler
    def get(self):
        # 渲染响应给浏览器的数据
        name = self.get_argument('name')
        self.write('hello tornado')

    def post(self):
        # self.write('hello tornado post')
        name = self.get_argument('name')

class ResHandler(tornado.web.RequestHandler):
    def get(self):

        self.write('
zzz
')
        self.set_status(404)
        self.set_cookie('zzz', '123',expires_days=1)
        # self.clear_cookie('zzz')

        self.redirect('/')

class DaysHandler(tornado.web.RequestHandler):
    # def get(self, year, month, day):
    def get(self, month, day, year):  # http://127.0.0.1/days/2019/03/11/:11年2019月03日

        self.write('%s年%s月%s日' %(year , month, day))

class Days2Handler(tornado.web.RequestHandler):
    # def get(self, year, month, day):
    def get(self,  month, day, year): # 2019年03月11日
        # 用了参数P之后则就一一对应起来，不受一开始get里参数的顺序影响

        self.write('%s年%s月%s日day' %(year , month, day))

    def post(self, month, day, year):
        self.write('post: 只负责新增数据')

    def delete(self, month, day, year):
        self.write('delete: 只负责删除')

    def patch(self, month, day, year):
        self.write('patch: 修改全部属性')

    def put(self,month, day, year):
        self.write('put: 修改全部属性')

class EntryHandler(tornado.web.RequestHandler):
    def initialize(self):
        self.conn = pymysql.Connection(host='127.0.0.1',user='root',password='root',port=3306,database='flask9')
        self.cursor = self.conn.cursor()
        print('initialize')
        # self.write('initialize')

    def prepare(self):
        print('prepare')

    def get(self):
        print('get')
        # 查询flask9数据库 查询所有学生信息
        sql = 'select * from stu;'
        self.cursor.execute(sql)
        data = self.cursor.fetchall()
        print(data)
        self.write('查询数据')

    def post(self):
        pass

    def on_finish(self):
        # 最后执行的方法
        print('on_finish')
        self.conn.close()

class IndexHandler(tornado.web.RequestHandler):
    def get(self):
        self.render('index.html')

def make_app():
    # handlers里参数中定义路由匹配地址
    return tornado.web.Application(handlers=[
        (r'/', MainHandler),
        (r'/res/', ResHandler),
        (r'/days/(\d{4})/(\d{2})/(\d{2})/', DaysHandler),
        (r'/days2/(?P\d{4})/(?P\d{2})/(?P\d{2})/', Days2Handler),
        (r'/entry_point/', EntryHandler),
        (r'/index/', IndexHandler)
    ],
    #     D:\workspace\tornado\day01\templates
    template_path=os.path.join(os.path.dirname(os.path.abspath(__file__)),'templates')
    )

if __name__ == '__main__':
    # 解析启动命令 python xxx.py --port=端口号
    parse_command_line()
    # 启动
    app = make_app()
    app.listen(options.port)
    # 监听IO实例
    tornado.ioloop.IOLoop.current().start()

base.html

    
    
    {% block title %}
    {% end %}


{% block content%}

{% end %}

index.html

{% extends 'base.html' %}

{% block title %}
    首页(子模板)
{% end %}

{% block content %}
    
hello 模板继承
{% end %}