Fixed #5596 -- Changed the static view for the development server so that Django doesn't crash if somebody tries to serve a 200MB file. Patch from eibaan.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@6939 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/core/servers/basehttp.py

@@ -398,8 +398,20 @@ class ServerHandler(object):
             self.bytes_sent += len(data)
 
         # XXX check Content-Length and truncate if too many bytes written?
-        self._write(data)
-        self._flush()
+
+        # If data is too large, socket will choke, so write chunks no larger
+        # than 32MB at a time.
+        length = len(data)
+        if length > 33554432:
+            offset = 0
+            while offset < length:
+                chunk_size = min(33554432, length)
+                self._write(data[offset:offset+chunk_size])
+                self._flush()
+                offset += chunk_size
+        else:
+            self._write(data)
+            self._flush()
 
     def sendfile(self):
         """Platform-specific file transmission

django/views/static.py

@@ -59,10 +59,11 @@ def serve(request, path, document_root=None, show_indexes=False):
     if not was_modified_since(request.META.get('HTTP_IF_MODIFIED_SINCE'),
                               statobj[stat.ST_MTIME], statobj[stat.ST_SIZE]):
         return HttpResponseNotModified()
-    mimetype = mimetypes.guess_type(fullpath)[0]
+    mimetype = mimetypes.guess_type(fullpath)[0] or 'application/octet-stream'
     contents = open(fullpath, 'rb').read()
     response = HttpResponse(contents, mimetype=mimetype)
     response["Last-Modified"] = http_date(statobj[stat.ST_MTIME])
+    response["Content-Length"] = len(contents)
     return response
 
 DEFAULT_DIRECTORY_INDEX_TEMPLATE = """

tests/regressiontests/views/media/file.unknown

@@ -0,0 +1 @@
+An unknown file extension.

tests/regressiontests/views/tests/static.py

@@ -13,11 +13,15 @@ class StaticTests(TestCase):
             response = self.client.get('/views/site_media/%s' % filename)
             file = open(path.join(media_dir, filename))
             self.assertEquals(file.read(), response.content)
+            self.assertEquals(len(response.content), int(response['Content-Length']))
+
+    def test_unknown_mime_type(self):
+        response = self.client.get('/views/site_media/file.unknown')
+        self.assertEquals('application/octet-stream', response['Content-Type'])
 
     def test_copes_with_empty_path_component(self):
         file_name = 'file.txt'
         response = self.client.get('/views/site_media//%s' % file_name)
         file = open(path.join(media_dir, file_name))
         self.assertEquals(file.read(), response.content)
-        
-        
+