手写简单的web框架
WebServer
import socket import pymysql def index(request): ''' 处理用户请求，并回相应的内容 request: 用户请求的所有信息 ''' return '<img src="https://baidubaike.com/base/dede/swsww237b.jpg"></img>' def login(request): with open('login.html','r',encoding='utf-8') as f: data = f.read() return data def time(request): import datetime now = datetime.datetime.now().strftime('%Y-%m-%d %X') with open('time.html','r',encoding='utf-8') as f: data = f.read() data = data.repalce('@@time@@',now) return data def user_list(request): #连接数据库拿数据 拿到一个数据连接 conn = pymysql.connect(host='127.0.0.1',port='3306',user='root',database='test',password='') #拿到一个游标对象 cursor = conn.cursor(cursor=pymysql.cursors.DictCursor) #执行sql cursor.execute('select id,name,password from user') #把数据拿出来 user_list = cursor.fetchall() print(user_list) cursor.close() conn.close() tr_list = [] for row in user_list: #每个row数据库里一行数据 tr = '<tr><td>%s</td><td>%s</td><td>%s</td></tr>'%(row['id'],row['name'],row['password']) tr_list.append(tr) with open('user_list.html','r',encoding='utf-8') as f: data = f.read() data = data.replace('@@body@@',''.join(tr_list)) return data #使用jinja2 def user_list_new(request): #创建连接 conn = pymysql.connect(host='127.0.0.1',port='3306',user='root',database='test',password='') cursor = conn.cursor(cursor=pymysql.cursors.DictCursor) cursor.execute('select * from user') user_list = fetchall() cursor.close() conn.close() with open('user_list_new.html','r',encoding='utf-8') as f: data = f.read() from jinja2 import Template #基于第三方工具实现模板渲染 #模板渲染（模板+数据） template = Template(data) response = template.render(user_list=user_list) # 数据替换模板指定位置 return response urls = [ ('/index',index), ('/login',login), ('/time',time), ('/user_list',user_list), ('/user_list_new',user_list_new), ] def run (): sk = socket.socket() sk = socket.bind(('127.0.0.1',8080)) sk = sockrt.listen(5) while True: conn,port = sk.accept() data = conn.recv(1024) print(data) data = str(data,encoding='utf-8') request_list = data.split(' ') head_list = request_list[0].split(' ') method, url, htt = head_list[0].split(' ') conn.send(b'HTTP/1.1 200 OK ') print(url) func_name = None for u in urls: if url == u[0]: func_name = u[1] break if func_name: response = func_name(data) else: response = '404 not found' conn.send(response.encode("utf-8")) conn.close() if __name__ == '__main__': run()
login.html
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> </head> <body> <form action=""> <p>用户名：<input type="text"></p> <p>密码：<input type="password"></p> </form> </body> </html>
time.html
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> </head> <body> @@time@@ </body> </html>
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>用户列表</title> </head> <body> <table border="1"> <thead> <tr> <th>id</th> <th>用户名</th> <th>密码</th> </tr> </thead> <tbody> @@body@@ </tbody> </table> </body> </html>
user_list_new.html
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>用户列表</title> </head> <body> <table border="1"> <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>