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python wsgi教程2——环境变量

环境变量字典包含了类似于CGI的变量，它是在每次请求时被服务器填充。

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#! /usr/bin/env python

# Our tutorial's WSGI server
from wsgiref.simple_server import make_server

def application(environ, start_response):

   # Sorting and stringifying the environment key, value pairs
   response_body = ['%s: %s' % (key, value)
                    for key, value in sorted(environ.items())]
   response_body = '\n'.join(response_body)

   status = '200 OK'
   response_headers = [('Content-Type', 'text/plain'),
                  ('Content-Length', str(len(response_body)))]
   start_response(status, response_headers)

   return [response_body]

# Instantiate the WSGI server.
# It will receive the request, pass it to the application
# and send the application's response to the client
httpd = make_server(
   'localhost', # The host name.
   8051, # A port number where to wait for the request.
   application # Our application object name, in this case a function.
   )

# Wait for a single request, serve it and quit.
httpd.handle_request()

执行该脚本，然后在浏览器中打开http://localhost:8051/ 查看效果。

这个例子是将环境变量字典的值全部输出。