From b6ca69e4f109c745f022885ecb8aa86255f84ecf Mon Sep 17 00:00:00 2001 From: Richard van der Hoff Date: Wed, 28 Oct 2020 15:51:15 +0000 Subject: Remove frozendict_json_encoder and support frozendicts everywhere Not being able to serialise `frozendicts` is fragile, and it's annoying to have to think about which serialiser you want. There's no real downside to supporting frozendicts, so let's just have one json encoder. --- synapse/util/__init__.py | 24 +++++++++++++++++++++--- synapse/util/frozenutils.py | 22 ---------------------- 2 files changed, 21 insertions(+), 25 deletions(-) (limited to 'synapse/util') diff --git a/synapse/util/__init__.py b/synapse/util/__init__.py index d55b93d763..517686f0a6 100644 --- a/synapse/util/__init__.py +++ b/synapse/util/__init__.py @@ -18,6 +18,7 @@ import logging import re import attr +from frozendict import frozendict from twisted.internet import defer, task @@ -31,9 +32,26 @@ def _reject_invalid_json(val): raise ValueError("Invalid JSON value: '%s'" % val) -# Create a custom encoder to reduce the whitespace produced by JSON encoding and -# ensure that valid JSON is produced. -json_encoder = json.JSONEncoder(allow_nan=False, separators=(",", ":")) +def _handle_frozendict(obj): + """Helper for json_encoder. Makes frozendicts serializable by returning + the underlying dict + """ + if type(obj) is frozendict: + # fishing the protected dict out of the object is a bit nasty, + # but we don't really want the overhead of copying the dict. + return obj._dict + raise TypeError( + "Object of type %s is not JSON serializable" % obj.__class__.__name__ + ) + + +# A custom JSON encoder which: +# * handles frozendicts +# * produces valid JSON (no NaNs etc) +# * reduces redundant whitespace +json_encoder = json.JSONEncoder( + allow_nan=False, separators=(",", ":"), default=_handle_frozendict +) # Create a custom decoder to reject Python extensions to JSON. json_decoder = json.JSONDecoder(parse_constant=_reject_invalid_json) diff --git a/synapse/util/frozenutils.py b/synapse/util/frozenutils.py index bf094c9386..5f7a6dd1d3 100644 --- a/synapse/util/frozenutils.py +++ b/synapse/util/frozenutils.py @@ -13,8 +13,6 @@ # See the License for the specific language governing permissions and # limitations under the License. -import json - from frozendict import frozendict @@ -49,23 +47,3 @@ def unfreeze(o): pass return o - - -def _handle_frozendict(obj): - """Helper for EventEncoder. Makes frozendicts serializable by returning - the underlying dict - """ - if type(obj) is frozendict: - # fishing the protected dict out of the object is a bit nasty, - # but we don't really want the overhead of copying the dict. - return obj._dict - raise TypeError( - "Object of type %s is not JSON serializable" % obj.__class__.__name__ - ) - - -# A JSONEncoder which is capable of encoding frozendicts without barfing. -# Additionally reduce the whitespace produced by JSON encoding. -frozendict_json_encoder = json.JSONEncoder( - allow_nan=False, separators=(",", ":"), default=_handle_frozendict, -) -- cgit 1.5.1