Unfreeze event before serializing with ujson

In newer versions of https://github.com/esnme/ultrajson, ujson does not
serialize frozendicts (introduced in esnme/ultrajson@53f85b1). Although
the PyPI version is still 1.35, Fedora ships with a build from commit
esnme/ultrajson@2f1d487. This causes the serialization to fail if the
distribution-provided package is used.

This runs the event through the unfreeze utility before serializing it.

Thanks to @ignatenkobrain for tracking down the root cause.

fixes #2351

Signed-off-by: Jeremy Cline <jeremy@jcline.org>
This commit is contained in:
Jeremy Cline 2017-09-30 11:22:37 -04:00
parent b4fd710e1a
commit cafb8de132
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@ -26,6 +26,7 @@ from synapse.types import (
from synapse.util.async import run_on_reactor, ReadWriteLock, Limiter
from synapse.util.logcontext import preserve_fn
from synapse.util.metrics import measure_func
from synapse.util.frozenutils import unfreeze
from synapse.visibility import filter_events_for_client
from ._base import BaseHandler
@ -503,7 +504,7 @@ class MessageHandler(BaseHandler):
# Ensure that we can round trip before trying to persist in db
try:
dump = ujson.dumps(event.content)
dump = ujson.dumps(unfreeze(event.content))
ujson.loads(dump)
except:
logger.exception("Failed to encode content: %r", event.content)