timeapp_werkz.py

#!/usr/bin/env python3
# Foundations of Python Network Programming, Third Edition
# https://github.com/brandon-rhodes/fopnp/blob/m/py3/chapter10/timeapp_werkz.py
# A WSGI callable built using Werkzeug.

import time
from werkzeug.wrappers import Request, Response

@Request.application
def app(request):
    host = request.host
    if ':' in host:
        host, port = host.split(':', 1)
    if request.method != 'GET':
        return Response('501 Not Implemented', status=501)
    elif host != '127.0.0.1' or request.path != '/':
        return Response('404 Not Found', status=404)
    else:
        return Response(time.ctime())