code: def setup(self, environ):
          '''Called once only to setup the WSGI application handler.
  
          Check :ref:`lazy wsgi handler <wsgi-lazy-handler>`
          section for further information.
          '''
          request = wsgi_request(environ)
          cfg = request.cache.cfg
          loop = request.cache._loop
          self.store = create_store(cfg.data_store, loop=loop)
          pubsub = self.store.pubsub(protocol=Protocol())
          channel = '%s_webchat' % self.name
          ensure_future(pubsub.subscribe(channel), loop=loop)
          return WsgiHandler([Router('/', get=self.home_page),
                              WebSocket('/message', Chat(pubsub, channel)),
                              Router('/rpc', post=Rpc(pubsub, channel),
                                     response_content_types=JSON_CONTENT_TYPES)],
                             [AsyncResponseMiddleware,
                              GZipMiddleware(min_length=20)]f setup(self, environ):
          '''Called once only to setup the WSGI application handler.
  
          Check :ref:`lazy wsgi handler <wsgi-lazy-handler>`
          section for further information.
          '''
          request = wsgi_request(environ)
          cfg = request.cache.cfg
          loop = request.cache._loop
          self.store = create_store(cfg.data_store, loop=loop)
          pubsub = self.store.pubsub(protocol=Protocol())
          channel = '%s_webchat' % self.name
          ensure_future(pubsub.subscribe(channel), loop=loop)
          return WsgiHandler([Router('/', get=self.home_page),
                              WebSocket('/message', Chat(pubsub, channel)),
                              Router('/rpc', post=Rpc(pubsub, channel),
                                     response_content_types=JSON_CONTENT_TYPES)],
                             [AsyncResponseMiddleware,
                              GZipMiddleware(min_length=20)])
docs: Called once only to setup the WSGI application handler.
  
          Check :ref:`lazy wsgi handler <wsgi-lazy-handler>`
          section for further information.