charset param gets now appended to response's Content-Type. Closes #807

rest_framework/negotiation.py

@@ -58,11 +58,17 @@ class DefaultContentNegotiation(BaseContentNegotiation):
                             _MediaType(media_type).precedence):
                             # Eg client requests '*/*'
                             # Accepted media type is 'application/json'
-                            return renderer, renderer.media_type
+                            renderer_and_media_type = renderer, renderer.media_type
                         else:
                             # Eg client requests 'application/json; indent=8'
                             # Accepted media type is 'application/json; indent=8'
-                            return renderer, media_type
+                            renderer_and_media_type = renderer, media_type
+                        if renderer.charset:
+                            charset = renderer.charset
+                        else:
+                            charset = self.__class__.settings.DEFAULT_CHARSET
+                        retval = renderer_and_media_type + (charset,)
+                        return retval
 
         raise exceptions.NotAcceptable(available_renderers=renderers)
 

rest_framework/renderers.py

@@ -36,11 +36,11 @@ class BaseRenderer(object):
 
     media_type = None
     format = None
+    charset = None
 
     def render(self, data, accepted_media_type=None, renderer_context=None):
         raise NotImplemented('Renderer class requires .render() to be implemented')
 
-
 class JSONRenderer(BaseRenderer):
     """
     Renderer which serializes to json.

rest_framework/response.py

@@ -39,14 +39,18 @@ class Response(SimpleTemplateResponse):
     def rendered_content(self):
         renderer = getattr(self, 'accepted_renderer', None)
         media_type = getattr(self, 'accepted_media_type', None)
+        charset = getattr(self, 'charset', None)
         context = getattr(self, 'renderer_context', None)
 
         assert renderer, ".accepted_renderer not set on Response"
         assert media_type, ".accepted_media_type not set on Response"
         assert context, ".renderer_context not set on Response"
         context['response'] = self
-
-        self['Content-Type'] = media_type
+        if charset is not None:
+            ct = "{0}; charset={1}".format(media_type, charset)
+        else:
+            ct = media_type
+        self['Content-Type'] = ct
         return renderer.render(self.data, media_type, context)
 
     @property

rest_framework/settings.py

@@ -83,6 +83,8 @@ DEFAULTS = {
     'FORMAT_SUFFIX_KWARG': 'format',
 
     # Input and output formats
+    'DEFAULT_CHARSET': None,
+    
     'DATE_INPUT_FORMATS': (
         ISO_8601,
     ),

rest_framework/tests/negotiation.py

@@ -3,18 +3,24 @@ from django.test import TestCase
 from django.test.client import RequestFactory
 from rest_framework.negotiation import DefaultContentNegotiation
 from rest_framework.request import Request
+from rest_framework.renderers import BaseRenderer
 
 
 factory = RequestFactory()
 
 
-class MockJSONRenderer(object):
+class MockJSONRenderer(BaseRenderer):
     media_type = 'application/json'
 
-
-class MockHTMLRenderer(object):
+class MockHTMLRenderer(BaseRenderer):
     media_type = 'text/html'
 
+class NoCharsetSpecifiedRenderer(BaseRenderer):
+    media_type = 'my/media'
+
+class CharsetSpecifiedRenderer(BaseRenderer):
+    media_type = 'my/media'
+    charset = 'mycharset'
 
 class TestAcceptedMediaType(TestCase):
     def setUp(self):
@@ -26,15 +32,32 @@ class TestAcceptedMediaType(TestCase):
 
     def test_client_without_accept_use_renderer(self):
         request = Request(factory.get('/'))
-        accepted_renderer, accepted_media_type = self.select_renderer(request)
+        accepted_renderer, accepted_media_type, charset = self.select_renderer(request)
         self.assertEqual(accepted_media_type, 'application/json')
 
     def test_client_underspecifies_accept_use_renderer(self):
         request = Request(factory.get('/', HTTP_ACCEPT='*/*'))
-        accepted_renderer, accepted_media_type = self.select_renderer(request)
+        accepted_renderer, accepted_media_type, charset = self.select_renderer(request)
         self.assertEqual(accepted_media_type, 'application/json')
 
     def test_client_overspecifies_accept_use_client(self):
         request = Request(factory.get('/', HTTP_ACCEPT='application/json; indent=8'))
-        accepted_renderer, accepted_media_type = self.select_renderer(request)
+        accepted_renderer, accepted_media_type, charset = self.select_renderer(request)
         self.assertEqual(accepted_media_type, 'application/json; indent=8')
+        
+class TestCharset(TestCase):
+    def setUp(self):
+        self.renderers = [NoCharsetSpecifiedRenderer()]
+        self.negotiator = DefaultContentNegotiation()
+    
+    def test_returns_none_if_no_charset_set(self):
+        request = Request(factory.get('/'))
+        renderers = [NoCharsetSpecifiedRenderer()]
+        _, _, charset = self.negotiator.select_renderer(request, renderers)
+        self.assertIsNone(charset)
+    
+    def test_returns_attribute_from_renderer_if_charset_is_set(self):
+        request = Request(factory.get('/'))
+        renderers = [CharsetSpecifiedRenderer()]
+        _, _, charset =  self.negotiator.select_renderer(request, renderers)
+        self.assertEquals(CharsetSpecifiedRenderer.charset, charset)
\ No newline at end of file

rest_framework/tests/response.py

@@ -12,7 +12,6 @@ from rest_framework.renderers import (
 from rest_framework.settings import api_settings
 from rest_framework.compat import six
 
-
 class MockPickleRenderer(BaseRenderer):
     media_type = 'application/pickle'
 
@@ -20,6 +19,8 @@ class MockPickleRenderer(BaseRenderer):
 class MockJsonRenderer(BaseRenderer):
     media_type = 'application/json'
 
+class MockTextMediaRenderer(BaseRenderer):
+    media_type = 'text/html'
 
 DUMMYSTATUS = status.HTTP_200_OK
 DUMMYCONTENT = 'dummycontent'
@@ -43,14 +44,18 @@ class RendererB(BaseRenderer):
     def render(self, data, media_type=None, renderer_context=None):
         return RENDERER_B_SERIALIZER(data)
 
+class RendererC(RendererB):
+    media_type = 'mock/rendererc'
+    format = 'formatc'
+    charset = "rendererc"
+
 
 class MockView(APIView):
-    renderer_classes = (RendererA, RendererB)
+    renderer_classes = (RendererA, RendererB, RendererC)
 
     def get(self, request, **kwargs):
         return Response(DUMMYCONTENT, status=DUMMYSTATUS)
 
-
 class HTMLView(APIView):
     renderer_classes = (BrowsableAPIRenderer, )
 
@@ -64,10 +69,9 @@ class HTMLView1(APIView):
     def get(self, request, **kwargs):
         return Response('text')
 
-
 urlpatterns = patterns('',
-    url(r'^.*\.(?P<format>.+)$', MockView.as_view(renderer_classes=[RendererA, RendererB])),
-    url(r'^$', MockView.as_view(renderer_classes=[RendererA, RendererB])),
+    url(r'^.*\.(?P<format>.+)$', MockView.as_view(renderer_classes=[RendererA, RendererB, RendererC])),
+    url(r'^$', MockView.as_view(renderer_classes=[RendererA, RendererB, RendererC])),
     url(r'^html$', HTMLView.as_view()),
     url(r'^html1$', HTMLView1.as_view()),
     url(r'^restframework', include('rest_framework.urls', namespace='rest_framework'))
@@ -173,3 +177,44 @@ class Issue122Tests(TestCase):
         Test if no infinite recursion occurs.
         """
         self.client.get('/html1')
+
+class Issue807Testts(TestCase):
+    """
+    Covers #807
+    """
+    
+    urls = 'rest_framework.tests.response'
+    
+    def test_does_not_append_charset_by_default(self):
+        """
+        For backwards compatibility `REST_FRAMEWORK['DEFAULT_CHARSET']` defaults
+        to None, so that all legacy code works as expected.
+        """
+        headers = {"HTTP_ACCEPT": RendererA.media_type}
+        resp = self.client.get('/', **headers)
+        self.assertEquals(RendererA.media_type, resp['Content-Type'])
+    
+    def test_if_there_is_charset_specified_on_renderer_it_gets_appended(self):
+        """
+        If renderer class has charset attribute declared, it gets appended
+        to Response's Content-Type
+        """
+        resp = self.client.get('/?format=%s' % RendererC.format)
+        expected = "{0}; charset={1}".format(RendererC.media_type, RendererC.charset)
+        self.assertEquals(expected, resp['Content-Type'])
+    
+    def test_if_there_is_default_charset_specified_it_gets_appended(self):
+        """
+        If user defines `REST_FRAMEWORK['DEFAULT_CHARSET']` it will get appended
+        to Content-Type of all responses.
+        """
+        original_default_charset = api_settings.DEFAULT_CHARSET
+        api_settings.DEFAULT_CHARSET = "utf-8"
+        headers = {'HTTP_ACCEPT': RendererA.media_type}
+        resp = self.client.get('/', **headers)
+        expected = "{0}; charset={1}".format(
+            RendererA.media_type,
+            api_settings.DEFAULT_CHARSET
+        )
+        self.assertEquals(expected, resp['Content-Type'])
+        api_settings.DEFAULT_CHARSET = original_default_charset
\ No newline at end of file

rest_framework/views.py

@@ -183,7 +183,9 @@ class APIView(View):
             return conneg.select_renderer(request, renderers, self.format_kwarg)
         except Exception:
             if force:
-                return (renderers[0], renderers[0].media_type)
+                charset = renderers[0].charset
+                charset = charset if charset is not None else api_settings.DEFAULT_CHARSET
+                return (renderers[0], renderers[0].media_type, renderers[0].charset)
             raise
 
     def perform_authentication(self, request):
@@ -250,7 +252,10 @@ class APIView(View):
 
         # Perform content negotiation and store the accepted info on the request
         neg = self.perform_content_negotiation(request)
-        request.accepted_renderer, request.accepted_media_type = neg
+        renderer, media_type, charset = neg
+        request.accepted_renderer = renderer
+        request.accepted_media_type = media_type
+        request.accepted_charset = charset
 
     def finalize_response(self, request, response, *args, **kwargs):
         """
@@ -265,11 +270,16 @@ class APIView(View):
         if isinstance(response, Response):
             if not getattr(request, 'accepted_renderer', None):
                 neg = self.perform_content_negotiation(request, force=True)
-                request.accepted_renderer, request.accepted_media_type = neg
+                renderer, media_type, charset = neg
+                request.accepted_renderer = renderer
+                request.accepted_media_type = media_type 
 
             response.accepted_renderer = request.accepted_renderer
             response.accepted_media_type = request.accepted_media_type
             response.renderer_context = self.get_renderer_context()
+            charset = request.accepted_renderer.charset
+            charset = charset if charset else api_settings.DEFAULT_CHARSET
+            response.charset = charset
 
         for key, value in self.headers.items():
             response[key] = value