foreword

Today we are going to do web development with Python, and make a simple website. As we all know, the function of the confession wall is generally more about publishing to find someone, lost and found, or a platform where everyone can publicly confess with their favorite people.

A brief introduction to the Tornado framework

In Python, there are three main WEB development frameworks, and today the Tornado framework is mainly used (although this framework is a lightweight framework that few people use)

Install Tornado framework module code
pip install tornado

Django
Flask
Tornado

Tornado Framework Advantages

Microframework, high performance
Asynchronous support

Tornado Framework Disadvantages

Fewer wheels, unlike Django and other frameworks that support a large number of plugins
Lack of the best actual combat, the company does not use much, and the learning materials are few

Tornado framework usage scenarios

Build microservices

The composition of the frame

Try Tornado first

First import the modules to be used this time

import time
from tornado import web, ioloop, httpserver

view

class MainPageHandler(web.RequestHandler):
    def get(self, *args, **kwargs):  # 对应get请求
        self.wrilt('hello tornado')

set route

app = web.Application(
    [
        (r"/", MainPageHandler),
    ]
)

"/" means to visit the home page, for example, the local domain name is 127.0.0.1:8000/, which means visiting this website, you will visit the home page

Set the front-end socket, call

if __name__ == "__main__":
    # 前端socket
    http_server = httpserver.HTTPServer(app)
    http_server.listen(8000)
    ioloop.IOLoop.current().start()

Run the program and test the water first

When Tornado starts, it will not prompt you to start it like Django and Flask

Set the home page, call the front-end file template

# 首页
class MainPageHandler(web.RequestHandler):
    def get(self, *args, **kwargs):
        self.render('index.html', name='表白墙', messages=MESSAGES)

This time the front-end file is called directly, and there are still a lot of materials on this website.

Website: https://www.17sucai.com/

set up

settings = {
    
    
    'template_path': 'templates',  # 设置模板文件路径
    'static_path': 'statics'  # 静态文件路径
}

confession wall view

class WishHandler(web.RequestHandler):
    def get(self, *args, **kwargs):  # 对应get请求
        self.render('wish.html',name='表白墙')

    def post(self, *args, **kwargs):
        # 获取前端传递数据
        content = self.get_argument('content', default=None)
        name = self.get_argument('name', default='匿名')
        if content:
            # 添加数据
            MESSAGES.append({
    
    
                'name': name,
                'content': content,
                'id': len(MESSAGES) + 1,
                'num': len(MESSAGES) + 1,
                'time': time.strftime('%Y-%m-%d %H:%M:%S')
            })
            # 跳转
            self.redirect('/')

        else:
            self.write('内容不能为空')

message

# 留言保存在全局变量中
MESSAGES = [
    {
    
    'id': 1, 'name': '学员', 'time': '2022-02-10 21:16:00', 'content': '真帅', 'num': 1}
]

Run the code to see the final effect

Python WEB development: use the Tornado framework to make a simple [confession wall] website