Fixed #9659: fixed `wsgi.file_wrapper` in the builtin server. Thanks, mitsuhiko.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@10690 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/core/servers/basehttp.py

@@ -306,14 +306,15 @@ class ServerHandler(object):
             env.setdefault('SERVER_SOFTWARE',self.server_software)
 
     def finish_response(self):
-        """Send any iterable data, then close self and the iterable
+        """
+        Send any iterable data, then close self and the iterable
 
-        Subclasses intended for use in asynchronous servers will
-        want to redefine this method, such that it sets up callbacks
-        in the event loop to iterate over the data, and to call
-        'self.close()' once the response is finished.
+        Subclasses intended for use in asynchronous servers will want to
+        redefine this method, such that it sets up callbacks in the event loop
+        to iterate over the data, and to call 'self.close()' once the response
+        is finished.
         """
-        if not self.result_is_file() and not self.sendfile():
+        if not self.result_is_file() or not self.sendfile():
             for data in self.result:
                 self.write(data)
             self.finish_content()

tests/regressiontests/builtin_server/tests.py

+from unittest import TestCase
+from StringIO import StringIO
+from django.core.servers.basehttp import ServerHandler
+
+#
+# Tests for #9659: wsgi.file_wrapper in the builtin server.
+# We need to mock a couple of of handlers and keep track of what
+# gets called when using a couple kinds of WSGI apps.
+#
+
+class DummyHandler(object):
+    def log_request(*args, **kwargs):
+        pass
+
+class FileWrapperHandler(ServerHandler):
+    def __init__(self, *args, **kwargs):
+        ServerHandler.__init__(self, *args, **kwargs)
+        self.request_handler = DummyHandler()
+        self._used_sendfile = False
+
+    def sendfile(self):
+        self._used_sendfile = True
+        return True
+
+def wsgi_app(environ, start_response):
+    start_response('200 OK', [('Content-Type', 'text/plain')])
+    return ['Hello World!']
+
+def wsgi_app_file_wrapper(environ, start_response):
+    start_response('200 OK', [('Content-Type', 'text/plain')])
+    return environ['wsgi.file_wrapper'](StringIO('foo'))
+
+class WSGIFileWrapperTests(TestCase):
+    """
+    Test that the wsgi.file_wrapper works for the builting server.
+    """
+
+    def test_file_wrapper_uses_sendfile(self):
+        env = {'SERVER_PROTOCOL': 'HTTP/1.0'}
+        err = StringIO()
+        handler = FileWrapperHandler(None, StringIO(), err, env)
+        handler.run(wsgi_app_file_wrapper)
+        self.assert_(handler._used_sendfile)
+
+    def test_file_wrapper_no_sendfile(self):
+        env = {'SERVER_PROTOCOL': 'HTTP/1.0'}
+        err = StringIO()
+        handler = FileWrapperHandler(None, StringIO(), err, env)
+        handler.run(wsgi_app)
+        self.failIf(handler._used_sendfile)
+        self.assertEqual(handler.stdout.getvalue().splitlines()[-1],'Hello World!')