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Merge pull request #6185 from matrix-org/erikj/fix_censored_evnets
Fix inserting bytes as text in `censor_redactions`
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changelog.d/6185.bugfix
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changelog.d/6185.bugfix
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Fix bug where redacted events were sometimes incorrectly censored in the database, breaking APIs that attempted to fetch such events.
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@ -23,7 +23,7 @@ from functools import wraps
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from six import iteritems, text_type
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from six.moves import range
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from canonicaljson import encode_canonical_json, json
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from canonicaljson import json
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from prometheus_client import Counter, Histogram
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from twisted.internet import defer
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@ -1632,9 +1632,7 @@ class EventsStore(
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and original_event.internal_metadata.is_redacted()
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):
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# Redaction was allowed
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pruned_json = encode_canonical_json(
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prune_event_dict(original_event.get_dict())
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)
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pruned_json = encode_json(prune_event_dict(original_event.get_dict()))
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else:
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# Redaction wasn't allowed
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pruned_json = None
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@ -0,0 +1,26 @@
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/* Copyright 2019 The Matrix.org Foundation C.I.C.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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-- There was a bug where we may have updated censored redactions as bytes,
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-- which can (somehow) cause json to be inserted hex encoded. This goes and
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-- undoes any such hex encoded JSON.
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UPDATE event_json SET json = convert_from(json::bytea, 'utf8')
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WHERE event_id IN (
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SELECT event_json.event_id
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FROM event_json
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INNER JOIN redactions ON (event_json.event_id = redacts)
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WHERE have_censored AND json NOT LIKE '{%'
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);
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