How to use the webob.dec.wsgify function in WebOb

    @webob.dec.wsgify(RequestClass=Request)
    def _dispatch(req):
        """Dispatch the request to the appropriate controller.

        Called by self._router after matching the incoming request to a route
        and putting the information into req.environ.  Either returns 404
        or the routed WSGI app's response.

        """
        match = req.environ['wsgiorg.routing_args'][1]
        if not match:
            return webob.exc.HTTPNotFound()
        app = match['controller']
        return app

    @webob.dec.wsgify(RequestClass=wsgi.Request)
    def __call__(self, req):
        try:
            return req.get_response(self.application)
        except Exception as ex:
            LOG.exception(_("Caught error: %s"), unicode(ex))
            exc = webob.exc.HTTPInternalServerError(explanation=unicode(ex))
            return faults.Fault(exc)

    @webob.dec.wsgify
    def __call__(self, req):
        """Route the incoming request to a controller based on self.map.

        If no match, return a 404.
        """
        return self._router

    @webob.dec.wsgify(RequestClass=wsgi.Request)
    def __call__(self, req):
        try:
            return req.get_response(self.application)
        except Exception as ex:
            return self._error(ex, req)

    @webob.dec.wsgify(RequestClass=wsgi.Request)
    def __call__(self, req):
        if 'X-Auth-Token' not in req.headers:
            user_id = req.headers.get('X-Auth-User', 'admin')
            project_id = req.headers.get('X-Auth-Project-Id', 'admin')
            os_url = os.path.join(req.url, project_id)
            res = webob.Response()
            # NOTE(vish): This is expecting and returning Auth(1.1), whereas
            #             keystone uses 2.0 auth.  We should probably allow
            #             2.0 auth here as well.
            res.headers['X-Auth-Token'] = '%s:%s' % (user_id, project_id)
            res.headers['X-Server-Management-Url'] = os_url
            res.content_type = 'text/plain'
            res.status = '204'
            return res

        token = req.headers['X-Auth-Token']

    @webob.dec.wsgify(RequestClass=Request)
    def __call__(self, request):
        """WSGI method that controls (de)serialization and method dispatch."""
        action_args = self.get_action_args(request.environ)
        action = action_args.pop('action', None)

        # From reading the boto code, and observation of real AWS api responses
        # it seems that the AWS api ignores the content-type in the html header
        # Instead it looks at a "ContentType" GET query parameter
        # This doesn't seem to be documented in the AWS cfn API spec, but it
        # would appear that the default response serialization is XML, as
        # described in the API docs, but passing a query parameter of
        # ContentType=JSON results in a JSON serialized response...
        content_type = request.params.get("ContentType")

        LOG.info("Processing request: %(method)s %(path)s",
                 {'method': request.method, 'path': request.path})

    @wsgify
    def clip(self,req):
        '''proxy load a page for clipping'''
        self.base_script = '/motini/clip/'

        req.path_info_pop()
        req.path_info_pop()
        self.host = req.path_info_pop()
        self.my_path_info = req.path_info

        # add the proxy and link-rewriter WSGI middleware to these request on
        # the fly
        proxy = self._proxy_middleware(req)
        return req.get_response(proxy)

    @webob.dec.wsgify(RequestClass=wsgi.Request)
    def __call__(self, req):
        serializer = serializers.JSONResponseSerializer()
        resp = webob.Response(request=req)
        default_webob_exc = webob.exc.HTTPInternalServerError()
        resp.status_code = self.error.get('code', default_webob_exc.code)
        serializer.default(resp, self.error)
        return resp

    @webob.dec.wsgify
    def __call__(self, req):
        print ("*" * 40) + " REQUEST ENVIRON"
        for key, value in req.environ.items():
            print key, "=", value
        print
        resp = req.get_response(self.application)

        print ("*" * 40) + " RESPONSE HEADERS"
        for (key, value) in resp.headers.iteritems():
            print key, "=", value
        print

        resp.app_iter = self.print_generator(resp.app_iter)

        return resp

    @webob.dec.wsgify(RequestClass=wsgi.Request)
    def __call__(self, req):
        """Generate a WSGI response.

        Response is generated based on the exception passed to constructor.
        """
        # Replace the body with fault details.
        code = self.wrapped_exc.status_int
        fault_name = self._fault_names.get(code, "neutronServiceFault")
        fault_data = {
            fault_name: {
                'code': code,
                'message': self.wrapped_exc.explanation}}
        # 'code' is an attribute on the fault tag itself
        content_type = req.best_match_content_type()
        self.wrapped_exc.body = wsgi.Serializer().serialize(
            fault_data, content_type)