Blobstore service pass X-AppEngine-BlobUpload header for blob uploads
@@ -295,6 +295,7 @@ class UploadHandler(tornado.web.RequestHandler):
urlrequest.add_header("Content-Type",
'application/x-www-form-urlencoded')
+ urlrequest.add_header('X-AppEngine-BlobUpload', 'true')
for name, value in self.request.headers.items():
if name.lower() not in STRIPPED_HEADERS:
