基于wsgiref模块写的web框架

from wsgiref.simple_server import make_server
from urls import urls
from views import *
def run(env, response):
    '''
    :param env: 请求相关的所有数据类型
    :param response: 相应相关的数据类型
    :return: 返回给浏览器的数据
    '''
    # print(env)  # env 是一个大字典，wsgiref模块将http格式的数据转化成大字典
    response('200 OK',[])
    current_path = env.get('PATH_INFO')
    func = None
    for url in urls:
        if current_path == url[0]:
            func = url[1]
            break  # 匹配到一个后应该立刻结束for循环
    if func:
        res = func(env)
    else:
        res = error(env)
    return [res.encode('utf-8')]
if __name__ == '__main__':
    server = make_server('127.0.0.1',8080,run)
    '''
        会实时监听127.0.0.1:8080 地址，只要客户端来了都会交给run函数处理（会自动加括号‘run()'触法run函数的运行）
        flask启动源码
           make_server('127.0.0.1',8080,obj) 
           也会自动给obj加括号
                __call__
    '''
    server.serve_forever()  # 启动服务器

from views import *
# url与函数的对应关系
urls = [
    ('/index', index),
    ('/login', login),
    ('/xxx', xxx),
    ('/get_time', get_time),
    ('/get_dict', get_dict)
]

def index(env):
    return 'index'
def login(env):
    return 'login'
def error(env):
    return '404'
def xxx(env):
    with open(r'templates/02myxx.html', 'r', encoding='utf-8')as f:
        return f.read()
import datetime
def get_time(env):
    current_time = datetime.datetime.now().strftime('%Y-%m-%d-%X')
    #
    with open(r'templates/03mytime.html', 'r',encoding='utf-8')as f:
        data = f.read()
        # data就是一串字符串
    data = data.replace('dddd', current_time)
    return data
'''
    jinja2
'''
from  jinja2 import Template
def  get_dict(env):
    user_dict = {'username':'jason','age':18,'hobby':'read'}
    with open('templates/04get_dict.html', 'r',encoding='utf-8')as f:
        data = f.read()
    tmp = Template(data)
    res = tmp.render(user =user_dict)
    # 给get_dict.html 传递一个值，也页面上通过变量名user就能够拿到user_dict
    return res
import pymysql
def get_user(env):
    coon = pymysql.connect(
        host = '127.0.0.1',
        port = 3306,
        user = 'root',
        password = '2802017872liu',
        db = 'day59',
        charset = 'utf8',
        autoicommit = True
    )
    cursor = coon.cursor(cursor=pymysql.cursors.DictCursor)
    sql = 'select * from userinfo'
    affect_rows = cursor.execute(sql)
    dat_list = cursor.fetchall()
    # 将获取到的数据传输给HTML文件