Django【二】自定义web框架

自定义web框架

1、准备登录的html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <link rel="icon" href="favicon.ico">
</head>
<body>
<!--提交的位置 点击提交按钮相当于请求了这个网址-->
<form action="http://127.0.0.1:9000/auth" method="get">
    <input type="text" name="username" placeholder="username">
    <input type="password" name="password" placeholder="password">
    <button>提交</button>
</form>
</body>
</html>

登录页面

登录页面

2、将HTML页面发送到服务端

# -*- coding: utf-8 -*-
# @Time    : 2019/5/16 19:16
import webauth
from wsgiref.simple_server import make_server
from urllib.parse import parse_qs
def auth(environ):
    # 判断提交按钮的请求是什么请求
    if environ.get("REQUEST_METHOD")=="GET":
        # 获取用户输入的信息  username=xiaohei&password=123
        request_data = environ['QUERY_STRING']
        # 对信息进行解析   {'username': ['xiaohei'], 'password': ['123']}
        re_data = parse_qs(request_data)
        # 分别取出用户名和密码
        username = re_data['username'][0]
        password = re_data['password'][0]
        # 提交给服务器进行验证
        ret = webauth.auth(username,password)
        # 服务器返回验证信息
        if ret:
            with open("websuccess.html", "rb") as f:
                content = f.read()
            return [content]
        else:
            # 验证失败
            return [b"login failure"]

def login(environ):
    with open("login.html","rb") as f:
        content = f.read()
    return [content]
def log(environ):
    with open("favicon.ico","rb") as f:
        content = f.read()
    return [content]
li = [
    ("/login",login),
    ("/favicon.ico",log),
    ("/auth",auth),

]
def app(environ, start_response):
    # 封装响应信息
    start_response('200 OK', [('Content-Type', 'text/html'), ('k1', 'v1')])
    # environ 封装好的请求数据,字典的格式
    path = environ["PATH_INFO"]
    for i in li:
        # 判断用户输入的url
        if i[0] == path:
            # 调用url对应的函数
            ret = i[1](environ)
            return ret
            break
    else:
        # 用户输入的网址不合法
        return [b"404 not found"]

# 绑定ip和端口,有人连接就调用app函数
httpp = make_server("127.0.0.1",9000,app)
# 开始监听http请求
httpp.serve_forever()

服务端页面

服务端页面

3、数据库验证登录信息

# -*- coding: utf-8 -*-
# @Time    : 2019/5/16 19:42
import pymysql
# 数据库信息验证,验证用户名和密码
def auth(username,password):
    db = pymysql.connect(
        host="127.0.0.1",
        port=3306,
        user="root",
        password="root",
        database="day53",
        charset="utf8"   # 不能写-
    )
    cursor = db.cursor(pymysql.cursors.DictCursor)
    sql = "select * from info where username=%s and password=%s;"
    res = cursor.execute(sql,[username,password])
    print(res)
    if res:
        return True
    else:
        return False

验证登录

验证登录

4、返回登录成功页面