python web框架

Model (数据库操作) View （模板文件） Controller（业务处理）

简称MVC

也可以称MTV

Model Template （类似View） Controller

一个简单web框架

# -*- coding:utf-8 -*-
# Author:Brownyangyang
from wsgiref.simple_server import make_server

def RunServer(environ,start_response):
    #environ  封装客户端发来的数据
    #start_response  封装要返回给用户的数据
    start_response('200 OK',[('Content-Type','text/html')])
    return ['<h1>Hello,web!</h1>'.encode('utf-8'),]

if __name__ == '__main__':
    # 把ip,端口,函数传给make_server
    httpd = make_server('',8000,RunServer)
    print("Serving HTTP on port 8000......")
    httpd.serve_forever()

访问不同后缀

# -*- coding:utf-8 -*-
# Author:Brownyangyang
from wsgiref.simple_server import make_server

def handle_index():
    return ['<h1>This is index!</h1>'.encode ('utf-8'), ]

def handle_data():
    return ['<h1>This is data!</h1>'.encode ('utf-8'), ]

def RunServer(environ,start_response):
    #environ  封装客户端发来的数据
    #start_response  封装要返回给用户的数据
    start_response('200 OK',[('Content-Type','text/html')])
    current_url = environ['PATH_INFO']
    if current_url == '/index':
        return handle_index()
    elif current_url == '/data':
        return handle_data()
    else:
        return ['<h1>404</h1>'.encode ('utf-8'), ]


if __name__ == '__main__':
    # 把ip,端口,函数传给make_server
    httpd = make_server('',8000,RunServer)
    print("Serving HTTP on port 8000......")
    httpd.serve_forever()

View Code

再优化下

# -*- coding:utf-8 -*-
# Author:Brownyangyang
from wsgiref.simple_server import make_server

def handle_index():
    return ['<h1>This is index!</h1>'.encode ('utf-8'), ]

def handle_data():
    return ['<h1>This is data!</h1>'.encode ('utf-8'), ]

URL_DICT = {

    "/index":handle_index,
    "/data":handle_data,
}

def RunServer(environ,start_response):
    #environ  封装客户端发来的数据
    #start_response  封装要返回给用户的数据
    start_response('200 OK',[('Content-Type','text/html')])
    current_url = environ['PATH_INFO']
    func = None
    if current_url in URL_DICT:
        func = URL_DICT[current_url]
    if func:
        return func()
    else:
        return ['<h1>404!</h1>'.encode ('utf-8'), ]


if __name__ == '__main__':
    # 把ip,端口,函数传给make_server
    httpd = make_server('',8000,RunServer)
    print("Serving HTTP on port 8000......")
    httpd.serve_forever()


如何把上面拆分成MVC呢：

执行脚本a.py如下：

# -*- coding:utf-8 -*-
# Author:Brownyangyang
from wsgiref.simple_server import make_server
from Controller import account
URL_DICT = {

    "/index":account.handle_index,
    "/data":account.handle_data,
}

def RunServer(environ,start_response):
    #environ  封装客户端发来的数据
    #start_response  封装要返回给用户的数据
    start_response('200 OK',[('Content-Type','text/html')])
    current_url = environ['PATH_INFO']
    func = None
    if current_url in URL_DICT:
        func = URL_DICT[current_url]
    if func:
        return func()
    else:
        return ['<h1>404!</h1>'.encode ('utf-8'), ]


if __name__ == '__main__':
    # 把ip,端口,函数传给make_server
    httpd = make_server('',8000,RunServer)
    print("Serving HTTP on port 8000......")
    httpd.serve_forever()

在a.py当前路径新建View、Controller和Model

View下面建一个index.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<h1>index @uu</h1>

</body>
</html>

Controller下面建一个account.py，专门存放自定义方法

# -*- coding:utf-8 -*- 
# Author:Brownyangyang
import time

def handle_index():
    current_time = str(time.time())
    f = open('View/index.html',mode='rb')
    data = f.read()
    f.close()
    data = data.replace(b'@uu',current_time.encode('utf-8'))
    return [data, ]

def handle_data():
    return ['<h1>This is data!</h1>'.encode ('utf-8'), ]

Model没写，还没有这么复杂

ps：了解下wsgiref模块吧

WSGI（Web Server Common Interface）是专门为Python语言制定的web服务器与应用程序之间的网关接口规范，通俗的来说，只要一个服务器拥有一个实现了WSGI标准规范的模块（例如apache的mod_wsgi模块），那么任意的实现了WSGI规范的应用程序都能与它进行交互。因此，WSGI也主要分为两个程序部分：服务器部分和应用程序部分。
wsgiref则是官方给出的一个实现了WSGI标准用于演示用的简单Python内置库，它实现了一个简单的WSGI Server和WSGI Application（在simple_server模块中），主要分为五个模块：simple_server， util， headers， handlers， validate。