04 DIYweb框架

编辑本博客

wsgiref模块

按http请求协议解析数据

按http响应协议封装数据

方案一：直接用if...else...判断

#!/usr/bin/python
# -*- coding:utf-8 -*-
#@Time     : 2018/6/26 14:48
#@Author   :HuangYa
#@Email    :huangmingya66@163.com
#@File     :wsgi_server
#@Software :PyCharm

from wsgiref.simple_server import make_server
def application(environ,start_response):
    #environ:按http协议解析数据
    # start_response：按http协议组装数据
    start_response("200 OK",[])
    #当前请求路径
    path=environ.get("PATH_INFO")
    # 根据请求路径来确定返回的内容
    print("PATH:",path)
    if path=="/index":
        with open("index.html","rb") as f:
            data=f.read()
        return [data]
    # 浏览器图标显示
    if path=="/favicon.ico":
        with open("favicon.ico","rb") as f:
            data=f.read()
        return [data]
    elif path=="/login":
        with open("login.html","rb") as f:
            data=f.read()
        return [data]
    else:
        return ["<h1>Hi,WSGIref</hq>".encode("utf8")]
httped=make_server("",8091,application)
httped.serve_forever()

方案二：路由分发实现解耦

#!/usr/bin/python
# -*- coding:utf-8 -*-
#@Time     : 2018/6/26 14:48
#@Author   :HuangYa
#@Email    :huangmingya66@163.com
#@File     :wsgi_server
#@Software :PyCharm

from wsgiref.simple_server import make_server
def login(environ):
    with open("login.html", "rb") as f:
        data=f.read()
    return data
def index(environ):
    with open("index.html", "rb") as f:
        data=f.read()
    return data
def favi(environ):
    with open("favicon.ico", "rb") as f:
        data=f.read()
    return data
def register(environ):
    return "register page!".encode("utf8")
url_patterns=[("/login",login),
              ("/index",index),
              ("/register",register),
              ("/favicon.ico",favi)
              ]
def application(environ,start_response):
    # 当前请求路径
    start_response("200 OK",[])
    path=environ.get("PATH_INFO")
    print(path)
    func=None
    for item in url_patterns:
        if path==item[0]:
            func=item[1]
    if not func:
        return ["<h1>error</h1>".encode("utf8")]
    else:
        return [func(environ)]
httped=make_server("",8091,application)
httped.serve_forever()

方案三：将html，urls，views单独用独立文件

框架之数据库操作

main.py：启动文件，封装socket

#!/usr/bin/python
# -*- coding:utf-8 -*-
#@Time     : 2018/6/26 14:48
#@Author   :HuangYa
#@Email    :huangmingya66@163.com
#@File     :wsgi_server
#@Software :PyCharm

from wsgiref.simple_server import make_server
from urls import url_patterns
def application(environ,start_response):
    # 当前请求路径
    start_response("200 OK",[])
    path=environ.get("PATH_INFO")
    print(path)
    func=None
    for item in url_patterns:
        if path==item[0]:
            func=item[1]
    if not func:
        return ["<h1>error</h1>".encode("utf8")]
    else:
        return [func(environ)]
httped=make_server("",8091,application)
httped.serve_forever()

views.py：函数视图，固定一个形式参数，即视图函数

#!/usr/bin/python
# -*- coding:utf-8 -*-
#@Time     : 2018/6/26 15:59
#@Author   :HuangYa
#@Email    :huangmingya66@163.com
#@File     :views
#@Software :PyCharm
# from wsgiref.simple_server import parse_qs
import pymysql
def login(environ):
    print(environ)
    with open("templates/login.html", "rb") as f:
        data=f.read()
    return data
def index(environ):
    with open("templates/index.html", "rb") as f:
        data=f.read()
    return data
def favi(environ):
    with open("templates/favicon.ico", "rb") as f:
        data=f.read()
    return data
def register(environ):
    return "register page!".encode("utf8")
def auth(environ):
    try:
        request_body_size=int(environ.get("CONTENT_LENGTH",0))
    except (ValueError):
        request_body_size=0
    request_body=environ["wsgi.input"].read(request_body_size)
    data=parse_qs(request_body)
    user=data.get(b"username")[0].decode("utf8")
    pwd = data.get(b"pwd")[0].decode("utf8")
    conn = pymysql.connect("127.0.0.1", port=3306, user="root", passwd="123.com", db="web", charset="utf8")
    cursor=conn.cursor()
    sql="select * from userinfo where name='%s' and password='%s'"
    cursor.execute(sql,(user,pwd))
    if cursor.fetchall():
        return "login success.".encode("utf8")
    else:
        return "user or pwd is wrong.".encode("utf8")
def timer(environ):
    import datetime
    now=datetime.datetime.now().strftime("%y-%m-%d %H:%M:%S")
    return now.encode("utf8")

urls.py：视图与函数映射关系，即url控制器

#!/usr/bin/python
# -*- coding:utf-8 -*-
#@Time     : 2018/6/26 15:59
#@Author   :HuangYa
#@Email    :huangmingya66@163.com
#@File     :urls
#@Software :PyCharm
from views import *
url_patterns=[("/login",login),
              ("/index",index),
              ("/register",register),
              ("/favicon.ico",favi),
              ("/timer",timer),
              ("/auth",auth),
              ]

templates文件夹，存放html文件，即模板

models.py：项目启动前，在数据库中创建表结构，即与数据库相关

import pymysql
conn=pymysql.connect("127.0.0.1",port=3306,user="root",passwd="123.com",db="web",charset="utf8")
cur=conn.cursor()
sql="""
create table userinfo(
id int PRIMARY KEY auto_increment,
name VARCHAR(32),
password VARCHAR(32))
"""
cur.execute(sql)
conn.commit()
cur.close()
conn.close()