[1.5.x] Fixed #19519 -- Fired request_finished in the WSGI iterable's close().

Backport of acc5396.

django/core/handlers/wsgi.py

@@ -253,8 +253,8 @@ class WSGIHandler(base.BaseHandler):
             response = http.HttpResponseBadRequest()
         else:
             response = self.get_response(request)
-        finally:
-            signals.request_finished.send(sender=self.__class__)
+
+        response._handler_class = self.__class__
 
         try:
             status_text = STATUS_CODE_TEXT[response.status_code]

django/http/response.py

@@ -10,6 +10,7 @@ except ImportError:
     from urlparse import urlparse
 
 from django.conf import settings
+from django.core import signals
 from django.core import signing
 from django.core.exceptions import SuspiciousOperation
 from django.http.cookie import SimpleCookie
@@ -40,6 +41,9 @@ class HttpResponseBase(six.Iterator):
         self._headers = {}
         self._charset = settings.DEFAULT_CHARSET
         self._closable_objects = []
+        # This parameter is set by the handler. It's necessary to preserve the
+        # historical behavior of request_finished.
+        self._handler_class = None
         if mimetype:
             warnings.warn("Using mimetype keyword argument is deprecated, use"
                           " content_type instead", PendingDeprecationWarning)
@@ -225,7 +229,11 @@ class HttpResponseBase(six.Iterator):
     # See http://blog.dscpl.com.au/2012/10/obligations-for-calling-close-on.html
     def close(self):
         for closable in self._closable_objects:
-            closable.close()
+            try:
+                closable.close()
+            except Exception:
+                pass
+        signals.request_finished.send(sender=self._handler_class)
 
     def write(self, content):
         raise Exception("This %s instance is not writable" % self.__class__.__name__)

django/test/client.py

@@ -26,7 +26,6 @@ from django.utils.http import urlencode
 from django.utils.importlib import import_module
 from django.utils.itercompat import is_iterable
 from django.utils import six
-from django.db import close_connection
 from django.test.utils import ContextList
 
 __all__ = ('Client', 'RequestFactory', 'encode_file', 'encode_multipart')
@@ -72,6 +71,14 @@ class FakePayload(object):
         self.__len += len(content)
 
 
+def closing_iterator_wrapper(iterable, close):
+    try:
+        for item in iterable:
+            yield item
+    finally:
+        close()
+
+
 class ClientHandler(BaseHandler):
     """
     A HTTP Handler that can be used for testing purposes.
@@ -92,18 +99,20 @@ class ClientHandler(BaseHandler):
             self.load_middleware()
 
         signals.request_started.send(sender=self.__class__)
-        try:
-            request = WSGIRequest(environ)
-            # sneaky little hack so that we can easily get round
-            # CsrfViewMiddleware.  This makes life easier, and is probably
-            # required for backwards compatibility with external tests against
-            # admin views.
-            request._dont_enforce_csrf_checks = not self.enforce_csrf_checks
-            response = self.get_response(request)
-        finally:
-            signals.request_finished.disconnect(close_connection)
-            signals.request_finished.send(sender=self.__class__)
-            signals.request_finished.connect(close_connection)
+        request = WSGIRequest(environ)
+        # sneaky little hack so that we can easily get round
+        # CsrfViewMiddleware.  This makes life easier, and is probably
+        # required for backwards compatibility with external tests against
+        # admin views.
+        request._dont_enforce_csrf_checks = not self.enforce_csrf_checks
+        response = self.get_response(request)
+        # We're emulating a WSGI server; we must call the close method
+        # on completion.
+        if response.streaming:
+            response.streaming_content = closing_iterator_wrapper(
+                response.streaming_content, response.close)
+        else:
+            response.close()
 
         return response
 

django/test/utils.py

@@ -4,6 +4,8 @@ from xml.dom.minidom import parseString, Node
 
 from django.conf import settings, UserSettingsHolder
 from django.core import mail
+from django.core.signals import request_finished
+from django.db import close_connection
 from django.test.signals import template_rendered, setting_changed
 from django.template import Template, loader, TemplateDoesNotExist
 from django.template.loaders import cached
@@ -68,8 +70,10 @@ def setup_test_environment():
     """Perform any global pre-test setup. This involves:
 
         - Installing the instrumented test renderer
-        - Set the email backend to the locmem email backend.
+        - Setting the email backend to the locmem email backend.
         - Setting the active locale to match the LANGUAGE_CODE setting.
+        - Disconnecting the request_finished signal to avoid closing
+          the database connection within tests.
     """
     Template.original_render = Template._render
     Template._render = instrumented_test_render
@@ -81,6 +85,8 @@ def setup_test_environment():
 
     deactivate()
 
+    request_finished.disconnect(close_connection)
+
 
 def teardown_test_environment():
     """Perform any global post-test teardown. This involves: