GET /path HTTP/1.1
Header1: Value1
Header2: Value2
Header3: Value3

POST /path HTTP/1.1
Header1: Value1
Header2: Value2
Header3: Value3

body data goes here...

200 OK
Header1: Value1
Header2: Value2
Header3: Value3

body data goes here...

# hello.py

def application(environ, start_response):
  start_response('200 OK', [('Content-Type', 'text/html')])
  body = '<h1>Hello, %s!</h1>' % (environ['PATH_INFO'][1:] or 'web')
  return [body.encode('utf-8')]

# server.py

from wsgiref.simple_server import make_server
from hello import application

# 创建一个服务器，IP地址为空，端口是8000，处理函数是application:
httpd = make_server('', 8000, application)
print('Serving HTTP on port 8000...')
# 开始监听HTTP请求:
httpd.serve_forever()