前言
要说到应用程序,就不得不提的就是cs架构和BS架构
bs架构就是浏览器端和server端,我们不需要写客户端了,直接用浏览器接收来自server端的数据,进行解析
手写简易的server端
import socket soc=socket.socket() #实例化socket soc.bind(('127.0.0.1',8001)) #绑定ip地址和端口 soc.listen(5)#监听 while True: sock,addr=soc.accept()#等待客户端连接 sock.send(b'HTTP/1.1 200 OK Content-Type:Text/html ')#发送请求头和请求报文 data=str(sock.recv(1024),encoding='utf-8')#将请求过来的数据解析成字符串 print(data) data=data.split(' ')[0].split(' ')#将请求中的第一行提取出来 if '/index' in data: with open('index.html','rb') as f: ff=f.read() print(ff) sock.send(ff)#响应请求内容 else: sock.send(b'404') sock.close()
使用wsgiref手撸web框架
web框架运行文件wsgirefserver.py
# 这是一个web框架的测试模板wsgiref from wsgiref.simple_server import make_server from urlss import * def run(env, response): print(env) print(response) response('200 OK', [('Content-type', 'text/html')]) # 请求报文 position = env['PATH_INFO'] # 拿到请求体中的路由 func = None for url in urls: if url[0] == position: func = url[1] break if func: response = func() else: response = error() return [response.encode('utf-8'), ] if __name__ == '__main__': ser = make_server('127.0.0.1', 8001, run) ser.serve_forever()
视图views.py
#!/user/bin/env python3 # -*- coding: utf-8 -*- import time import datetime from jinja2 import Template import sys import pymysql def index(): with open('templates/index.html', 'r') as f: data = f.read() return data def test(): with open('templates/test.html', 'r') as f: data = f.read() tem = Template(data) response = tem.render(user={'name': 'andy', 'age': 18}) return response def timer(): ctime = time.strftime('%Y-%m-%d %H:%M:%S', time.localtime(time.time())) print(ctime) with open('templates/time.html', 'r') as f: data = f.read() data = data.replace('@@time@@', ctime) return data def error(): return '404' def user(): conn = pymysql.connect(host='127.0.0.1', port=3306, user='root', password='admin', db='web') cur = conn.cursor(pymysql.cursors.DictCursor) cur.execute('select * from userinfo') user_list = cur.fetchall() print(user_list) with open('templates/user.html', 'r') as f: data = f.read() tem = Template(data) response = tem.render(user_list=user_list) return response if __name__ == '__main__': user()
路由urlss.py
#!/user/bin/env python3 # -*- coding: utf-8 -*- from views import * urls = [ ('/index', index), ('/timer', timer), ('/test', test), ('/user', user), ]
templates/index.html
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> </head> <body> <h3>index</h3> <h2 style="color: red;">this is red wrod</h2> <img src="http://106.14.187.174/static/blog/img/rest_framework.jpg" alt=""> </body> </html>
templates/test.html
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> </head> <body> <h1>{{user.name}} {{user.age}}</h1> </body> </html>
templates/time.html
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> </head> <body> @@time@@ </body> </html>
templates/user.html
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>title</title> </head> <body> <h1>hello</h1> <h2>andy table</h2> <table border="2"> <thead> <tr> <th>id</th> <th>name</th> <th>password</th> </tr> </thead> <tbody> {% for user in user_list %} <tr> <td>{{user.id}}</td> <td>{{user.name}}</td> <td>{{user.password}}</td> </tr> {%endfor%} </tbody> </table> </body> </html>