Python 做一个简单的web框架

from wsgiref.simple_server import make_server
import time
def login(req):
    print(req["QUERY_STRING"])
    return b"welcome"

def signup(req):
    pass

def foo1(req):
    f=open("index1.html","rb")
    date = f.read()
    return date

def foo2(req):
    f = open("index2.html","rb")
    date = f.read()
    return date
def show_time(req):
    times=time.ctime()
    f=open("show_time.html","rb")
    data=f.read()
    data=data.decode("utf8")
    data=data.replace("{{time}}",str(times))
    # return  ("<h1>time:%s</h1>"%str(times)).encode("utf8")
    return  data.encode("utf8")
def router():
    url_patterns=[
        ("/login",login),
        ("/signup",signup),
        ("/yuan",foo2),
        ("/alex",foo1),
        ("/show_time",show_time),
    ]
    return url_patterns

def application(environ,start_respone):

    print("path",environ["PATH_INFO"])
    path=environ["PATH_INFO"]
    start_respone('200 OK',[('Content-Type','text/html')])

    url_patterns=router()

    func=None
    for item in url_patterns:
        if item[0]==path:
            func=item[1]
            break
    if func:
        return [func(environ)]
    else:
        return [b"404"]
httpd = make_server('',8080,application)

print('Serving Http on port 8080...')
#开始监听http请求
httpd.serve_forever()