# This is our application object. It could have any name,
# except when using mod_wsgi where it must be "application"
def application( # It accepts two arguments:
      # environ points to a dictionary containing CGI like environment variables
      # which is filled by the server for each received request from the client
      environ,
      # start_response is a callback function supplied by the server
      # which will be used to send the HTTP status and headers to the server
      start_response):

   # build the response body possibly using the environ dictionary
   response_body = ‘The request method was %s‘ % environ[‘REQUEST_METHOD‘]

   # HTTP response code and message
   status = ‘200 OK‘

   # These are HTTP headers expected by the client.
   # They must be wrapped as a list of tupled pairs:
   # [(Header name, Header value)].
   response_headers = [(‘Content-Type‘, ‘text/plain‘),
                       (‘Content-Length‘, str(len(response_body)))]

   # Send them to the server using the supplied function
   start_response(status, response_headers)

   # Return the response body.
   # Notice it is wrapped in a list although it could be any iterable.
   return [response_body]

def blog_list(request):
    blogs = Article.objects.all().order_by(‘-publish_date‘)
    blog_num = Article.objects.count()
    return render_to_response(‘index.html‘, {"blogs": blogs,"blog_num":blog_num}, context_instance=RequestContext(request))
def blog_detail(request):
    bid = request.GET.get(‘id‘,‘‘)
    blog = Article.objects.get(id=bid)
    return render_to_response(‘blog.html‘,{‘blog‘:blog})

import re
class WSGIapp:

    headers = []

    def __init__(self,urls=()):
        self.urls = urls
        self.status = ‘200 OK‘

    def __call__(self,environ,start_response):

        x = self.mapping_urls(environ)
        print x
        start_response(self.status,self.headers)

        if isinstance(x,str):
            return iter([x])
        else:
            return iter(x)

    def mapping_urls(self,environ):
        path = environ[‘PATH_INFO‘]

        for pattern,name in self.urls:
            m = re.match(‘^‘+pattern+‘$‘,path)
            if m:
                args = m.groups()
                func = globals()[name]
                return func(*args)
        return self.notfound()

    def notfound(self):
        self.status = ‘404 Not Found‘
        self.headers = [(‘Content-Type‘,‘text/plain‘)]
        return ‘404 Not Found\n‘

    @classmethod
    def header(cls,name,value):
        cls.headers.append((name,value))

def GET_index(*args):
    WSGIapp.header(‘Content-Type‘,‘text/plain‘)
    return ‘Welcome!\n‘
def GET_hello(*args):
    WSGIapp.header(‘Content-Type‘,‘text/plain‘)
    return ‘Hello %s!\n‘ % args
urls = [
    (‘/‘,‘GET_index‘),
    (‘/hello/(.*)‘,‘GET_hello‘)
    ]
wsgiapp = WSGIapp(urls)

if __name__ == ‘__main__‘:
    from wsgiref.simple_server import make_server
    httpd = make_server(‘‘,8000,wsgiapp)
    print ‘server starting...‘
    httpd.serve_forever()