Fixed #26052 -- Moved conditional_content_removal() processing to the test client.

django/core/handlers/base.py

@@ -24,10 +24,6 @@ logger = logging.getLogger('django.request')
 
 
 class BaseHandler(object):
-    # Changes that are always applied to a response (in this order).
-    response_fixes = [
-        http.conditional_content_removal,
-    ]
 
     def __init__(self):
         self._request_middleware = None
@@ -230,7 +226,6 @@ class BaseHandler(object):
                         "%s.process_response didn't return an "
                         "HttpResponse object. It returned None instead."
                         % (middleware_method.__self__.__class__.__name__))
-            response = self.apply_response_fixes(request, response)
         except Exception:  # Any exception should be gathered and handled
             signals.got_request_exception.send(sender=self.__class__, request=request)
             response = self.handle_uncaught_exception(request, resolver, sys.exc_info())
@@ -289,13 +284,3 @@ class BaseHandler(object):
         # Return an HttpResponse that displays a friendly error message.
         callback, param_dict = resolver.resolve_error_handler(500)
         return callback(request, **param_dict)
-
-    def apply_response_fixes(self, request, response):
-        """
-        Applies each of the functions in self.response_fixes to the request and
-        response, modifying the response in the process. Returns the new
-        response.
-        """
-        for func in self.response_fixes:
-            response = func(request, response)
-        return response

django/http/__init__.py

@@ -9,7 +9,6 @@ from django.http.response import (
     HttpResponsePermanentRedirect, HttpResponseRedirect,
     HttpResponseServerError, JsonResponse, StreamingHttpResponse,
 )
-from django.http.utils import conditional_content_removal
 
 __all__ = [
     'SimpleCookie', 'parse_cookie', 'HttpRequest', 'QueryDict',
@@ -19,5 +18,4 @@ __all__ = [
     'HttpResponseBadRequest', 'HttpResponseForbidden', 'HttpResponseNotFound',
     'HttpResponseNotAllowed', 'HttpResponseGone', 'HttpResponseServerError',
     'Http404', 'BadHeaderError', 'JsonResponse', 'FileResponse',
-    'conditional_content_removal',
 ]

django/http/utils.py

@@ -1,28 +0,0 @@
-"""
-Functions that modify an HTTP request or response in some way.
-"""
-
-# This group of functions are run as part of the response handling, after
-# everything else, including all response middleware. Think of them as
-# "compulsory response middleware". Be careful about what goes here, because
-# it's a little fiddly to override this behavior, so they should be truly
-# universally applicable.
-
-
-def conditional_content_removal(request, response):
-    """
-    Removes the content of responses for HEAD requests, 1xx, 204 and 304
-    responses. Ensures compliance with RFC 2616, section 4.3.
-    """
-    if 100 <= response.status_code < 200 or response.status_code in (204, 304):
-        if response.streaming:
-            response.streaming_content = []
-        else:
-            response.content = b''
-        response['Content-Length'] = '0'
-    if request.method == 'HEAD':
-        if response.streaming:
-            response.streaming_content = []
-        else:
-            response.content = b''
-    return response

django/test/client.py

@@ -92,6 +92,26 @@ def closing_iterator_wrapper(iterable, close):
         request_finished.connect(close_old_connections)
 
 
+def conditional_content_removal(request, response):
+    """
+    Simulate the behavior of most Web servers by removing the content of
+    responses for HEAD requests, 1xx, 204, and 304 responses. Ensures
+    compliance with RFC 2616, section 4.3.
+    """
+    if 100 <= response.status_code < 200 or response.status_code in (204, 304):
+        if response.streaming:
+            response.streaming_content = []
+        else:
+            response.content = b''
+        response['Content-Length'] = '0'
+    if request.method == 'HEAD':
+        if response.streaming:
+            response.streaming_content = []
+        else:
+            response.content = b''
+    return response
+
+
 class ClientHandler(BaseHandler):
     """
     A HTTP Handler that can be used for testing purposes. Uses the WSGI
@@ -120,6 +140,10 @@ class ClientHandler(BaseHandler):
 
         # Request goes through middleware.
         response = self.get_response(request)
+
+        # Simulate behaviors of most Web servers.
+        conditional_content_removal(request, response)
+
         # Attach the originating request to the response so that it could be
         # later retrieved.
         response.wsgi_request = request

docs/releases/1.10.txt

@@ -778,6 +778,11 @@ Miscellaneous
   attribute to ``False`` to disable it. You could also add the ``novalidate``
   attribute to ``<form>`` if you don't want browser validation.
 
+* The WSGI handler no longer removes content of responses from ``HEAD``
+  requests or responses with a ``status_code`` of 100-199, 204, or 304. Most
+  Web servers already implement this behavior. Responses retrieved using the
+  Django test client continue to have these "response fixes" applied.
+
 .. _deprecated-features-1.10:
 
 Features deprecated in 1.10

tests/test_client/test_conditional_content_removal.py

@@ -4,8 +4,8 @@ import gzip
 import io
 
 from django.http import HttpRequest, HttpResponse, StreamingHttpResponse
-from django.http.utils import conditional_content_removal
 from django.test import SimpleTestCase
+from django.test.client import conditional_content_removal
 
 
 # based on Python 3.3's gzip.compress
@@ -19,12 +19,12 @@ def gzip_compress(data):
     return buf.getvalue()
 
 
-class HttpUtilTests(SimpleTestCase):
+class ConditionalContentTests(SimpleTestCase):
 
     def test_conditional_content_removal(self):
         """
-        Tests that content is removed from regular and streaming responses with
-        a status_code of 100-199, 204, 304 or a method of "HEAD".
+        Content is removed from regular and streaming responses with a
+        status_code of 100-199, 204, 304, or a method of "HEAD".
         """
         req = HttpRequest()