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Ensure the body is a string before comparing push rules. (#7701)
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changelog.d/7701.bugfix
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1
changelog.d/7701.bugfix
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Do not break push rule evaluation when receiving an event with a non-string body. This is a long-standing bug.
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@ -131,7 +131,7 @@ class PushRuleEvaluatorForEvent(object):
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# XXX: optimisation: cache our pattern regexps
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# XXX: optimisation: cache our pattern regexps
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if condition["key"] == "content.body":
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if condition["key"] == "content.body":
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body = self._event.content.get("body", None)
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body = self._event.content.get("body", None)
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if not body:
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if not body or not isinstance(body, str):
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return False
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return False
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return _glob_matches(pattern, body, word_boundary=True)
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return _glob_matches(pattern, body, word_boundary=True)
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@ -147,7 +147,7 @@ class PushRuleEvaluatorForEvent(object):
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return False
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return False
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body = self._event.content.get("body", None)
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body = self._event.content.get("body", None)
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if not body:
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if not body or not isinstance(body, str):
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return False
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return False
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# Similar to _glob_matches, but do not treat display_name as a glob.
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# Similar to _glob_matches, but do not treat display_name as a glob.
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@ -21,7 +21,7 @@ from tests import unittest
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class PushRuleEvaluatorTestCase(unittest.TestCase):
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class PushRuleEvaluatorTestCase(unittest.TestCase):
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def setUp(self):
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def _get_evaluator(self, content):
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event = FrozenEvent(
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event = FrozenEvent(
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{
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{
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"event_id": "$event_id",
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"event_id": "$event_id",
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@ -29,37 +29,58 @@ class PushRuleEvaluatorTestCase(unittest.TestCase):
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"sender": "@user:test",
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"sender": "@user:test",
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"state_key": "",
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"state_key": "",
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"room_id": "@room:test",
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"room_id": "@room:test",
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"content": {"body": "foo bar baz"},
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"content": content,
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},
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},
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RoomVersions.V1,
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RoomVersions.V1,
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)
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)
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room_member_count = 0
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room_member_count = 0
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sender_power_level = 0
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sender_power_level = 0
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power_levels = {}
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power_levels = {}
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self.evaluator = PushRuleEvaluatorForEvent(
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return PushRuleEvaluatorForEvent(
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event, room_member_count, sender_power_level, power_levels
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event, room_member_count, sender_power_level, power_levels
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)
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)
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def test_display_name(self):
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def test_display_name(self):
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"""Check for a matching display name in the body of the event."""
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"""Check for a matching display name in the body of the event."""
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evaluator = self._get_evaluator({"body": "foo bar baz"})
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condition = {
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condition = {
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"kind": "contains_display_name",
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"kind": "contains_display_name",
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}
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}
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# Blank names are skipped.
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# Blank names are skipped.
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self.assertFalse(self.evaluator.matches(condition, "@user:test", ""))
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self.assertFalse(evaluator.matches(condition, "@user:test", ""))
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# Check a display name that doesn't match.
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# Check a display name that doesn't match.
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self.assertFalse(self.evaluator.matches(condition, "@user:test", "not found"))
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self.assertFalse(evaluator.matches(condition, "@user:test", "not found"))
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# Check a display name which matches.
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# Check a display name which matches.
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self.assertTrue(self.evaluator.matches(condition, "@user:test", "foo"))
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self.assertTrue(evaluator.matches(condition, "@user:test", "foo"))
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# A display name that matches, but not a full word does not result in a match.
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# A display name that matches, but not a full word does not result in a match.
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self.assertFalse(self.evaluator.matches(condition, "@user:test", "ba"))
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self.assertFalse(evaluator.matches(condition, "@user:test", "ba"))
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# A display name should not be interpreted as a regular expression.
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# A display name should not be interpreted as a regular expression.
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self.assertFalse(self.evaluator.matches(condition, "@user:test", "ba[rz]"))
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self.assertFalse(evaluator.matches(condition, "@user:test", "ba[rz]"))
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# A display name with spaces should work fine.
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# A display name with spaces should work fine.
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self.assertTrue(self.evaluator.matches(condition, "@user:test", "foo bar"))
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self.assertTrue(evaluator.matches(condition, "@user:test", "foo bar"))
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def test_no_body(self):
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"""Not having a body shouldn't break the evaluator."""
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evaluator = self._get_evaluator({})
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condition = {
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"kind": "contains_display_name",
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}
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self.assertFalse(evaluator.matches(condition, "@user:test", "foo"))
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def test_invalid_body(self):
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"""A non-string body should not break the evaluator."""
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condition = {
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"kind": "contains_display_name",
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}
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for body in (1, True, {"foo": "bar"}):
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evaluator = self._get_evaluator({"body": body})
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self.assertFalse(evaluator.matches(condition, "@user:test", "foo"))
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