commit 9aba22264b1bce883ebff2c54573ef26546339ad
author Alex Klein <saklein@chromium.org> Mon Apr 13 13:43:08 2020 -0600
committer Commit Bot <commit-bot@chromium.org> Tue Apr 14 14:51:24 2020 +0000
tree 684ca9c7fdfb7a6b4fed454e356a65116e380c0c
parent f848d333537bd3771adab65d7f74f51522f5f7a8

message_util: Default to an empty JSON dict.

Empty messages serialize to an empty string. The JSON parser
errors on an empty string. Instead, default to an empty JSON
dictionary when the message is empty.

BUG=None
TEST=cq

Change-Id: Ia73b840abcd61e584a86c635e6c9262f4b06ddc5
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/chromite/+/2147943
Tested-by: Alex Klein <saklein@chromium.org>
Reviewed-by: Michael Mortensen <mmortensen@google.com>
Commit-Queue: Alex Klein <saklein@chromium.org>

api/message_util.py

diff --git a/api/message_util.py b/api/message_util.py
index 82c7f4d..a72a1dc 100644
--- a/api/message_util.py
+++ b/api/message_util.py
@@ -142,7 +142,7 @@
     See: Serializer.serialize
     """
     return json_format.MessageToJson(
-        message, sort_keys=True, use_integers_for_enums=True)
+        message, sort_keys=True, use_integers_for_enums=True) or '{}'
 
 
 class MessageHandler(object):