diff --git a/django/core/handlers/base.py b/django/core/handlers/base.py index f216886d56..d653860547 100644 --- a/django/core/handlers/base.py +++ b/django/core/handlers/base.py @@ -133,7 +133,7 @@ class BaseHandler(object): if hasattr(response, 'render') and callable(response.render): for middleware_method in self._template_response_middleware: response = middleware_method(request, response) - response.render() + response = response.render() except http.Http404, e: logger.warning('Not Found: %s' % request.path, diff --git a/django/template/response.py b/django/template/response.py index a6ef893520..73645a7d72 100644 --- a/django/template/response.py +++ b/django/template/response.py @@ -92,11 +92,14 @@ class SimpleTemplateResponse(HttpResponse): Returns the baked response instance. """ + retval = self if not self._is_rendered: self._set_content(self.rendered_content) for post_callback in self._post_render_callbacks: - post_callback(self) - return self + newretval = post_callback(retval) + if newretval is not None: + retval = newretval + return retval is_rendered = property(lambda self: self._is_rendered) diff --git a/django/utils/decorators.py b/django/utils/decorators.py index 17f2ea30b3..78a14f6e24 100644 --- a/django/utils/decorators.py +++ b/django/utils/decorators.py @@ -97,10 +97,17 @@ def make_middleware_decorator(middleware_class): if result is not None: return result raise - if hasattr(middleware, 'process_response'): - result = middleware.process_response(request, response) - if result is not None: - return result + if hasattr(response, 'render') and callable(response.render): + if hasattr(middleware, 'process_template_response'): + response = middleware.process_template_response(request, response) + # Defer running of process_response until after the template + # has been rendered: + if hasattr(middleware, 'process_response'): + callback = lambda response: middleware.process_response(request, response) + response.add_post_render_callback(callback) + else: + if hasattr(middleware, 'process_response'): + return middleware.process_response(request, response) return response return wraps(view_func, assigned=available_attrs(view_func))(_wrapped_view) return _decorator diff --git a/docs/ref/template-response.txt b/docs/ref/template-response.txt index 90da00220e..1885edcf95 100644 --- a/docs/ref/template-response.txt +++ b/docs/ref/template-response.txt @@ -119,6 +119,10 @@ Methods rendered :class:`~django.template.response.SimpleTemplateResponse` instance. + If the callback returns a value that is not `None`, this will be + used as the response instead of the original response object (and + will be passed to the next post rendering callback etc.) + .. method:: SimpleTemplateResponse.render(): Sets :attr:`response.content` to the result obtained by diff --git a/tests/regressiontests/utils/decorators.py b/tests/regressiontests/utils/decorators.py index db32418de7..837cc7d39e 100644 --- a/tests/regressiontests/utils/decorators.py +++ b/tests/regressiontests/utils/decorators.py @@ -1,5 +1,7 @@ from django.http import HttpResponse from django.middleware.doc import XViewMiddleware +from django.template import Template, Context +from django.template.response import TemplateResponse from django.test import TestCase, RequestFactory from django.utils.decorators import decorator_from_middleware @@ -19,6 +21,26 @@ class ClassXView(object): class_xview = xview_dec(ClassXView()) +class FullMiddleware(object): + def process_request(self, request): + request.process_request_reached = True + + def process_view(sef, request, view_func, view_args, view_kwargs): + request.process_view_reached = True + + def process_template_response(self, request, response): + request.process_template_response_reached = True + return response + + def process_response(self, request, response): + # This should never receive unrendered content. + request.process_response_content = response.content + request.process_response_reached = True + return response + +full_dec = decorator_from_middleware(FullMiddleware) + + class DecoratorFromMiddlewareTests(TestCase): """ Tests for view decorators created using @@ -37,3 +59,48 @@ class DecoratorFromMiddlewareTests(TestCase): Test a middleware that implements process_view, operating on a callable class. """ class_xview(self.rf.get('/')) + + def test_full_dec_normal(self): + """ + Test that all methods of middleware are called for normal HttpResponses + """ + + @full_dec + def normal_view(request): + t = Template("Hello world") + return HttpResponse(t.render(Context({}))) + + request = self.rf.get('/') + response = normal_view(request) + self.assertTrue(getattr(request, 'process_request_reached', False)) + self.assertTrue(getattr(request, 'process_view_reached', False)) + # process_template_response must not be called for HttpResponse + self.assertFalse(getattr(request, 'process_template_response_reached', False)) + self.assertTrue(getattr(request, 'process_response_reached', False)) + + def test_full_dec_templateresponse(self): + """ + Test that all methods of middleware are called for TemplateResponses in + the right sequence. + """ + + @full_dec + def template_response_view(request): + t = Template("Hello world") + return TemplateResponse(request, t, {}) + + request = self.rf.get('/') + response = template_response_view(request) + self.assertTrue(getattr(request, 'process_request_reached', False)) + self.assertTrue(getattr(request, 'process_view_reached', False)) + self.assertTrue(getattr(request, 'process_template_response_reached', False)) + # response must not be rendered yet. + self.assertFalse(response._is_rendered) + # process_response must not be called until after response is rendered, + # otherwise some decorators like csrf_protect and gzip_page will not + # work correctly. See #16004 + self.assertFalse(getattr(request, 'process_response_reached', False)) + response.render() + self.assertTrue(getattr(request, 'process_response_reached', False)) + # Check that process_response saw the rendered content + self.assertEqual(request.process_response_content, "Hello world")