1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
|
# -*- coding: utf-8 -*-
# Copyright 2014, 2015 OpenMarket Ltd
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from synapse.api.constants import EventTypes
from . import EventBase
def prune_event(event):
""" Returns a pruned version of the given event, which removes all keys we
don't know about or think could potentially be dodgy.
This is used when we "redact" an event. We want to remove all fields that
the user has specified, but we do want to keep necessary information like
type, state_key etc.
"""
event_type = event.type
allowed_keys = [
"event_id",
"sender",
"room_id",
"hashes",
"signatures",
"content",
"type",
"state_key",
"depth",
"prev_events",
"prev_state",
"auth_events",
"origin",
"origin_server_ts",
"membership",
]
new_content = {}
def add_fields(*fields):
for field in fields:
if field in event.content:
new_content[field] = event.content[field]
if event_type == EventTypes.Member:
add_fields("membership")
elif event_type == EventTypes.Create:
add_fields("creator")
elif event_type == EventTypes.JoinRules:
add_fields("join_rule")
elif event_type == EventTypes.PowerLevels:
add_fields(
"users",
"users_default",
"events",
"events_default",
"events_default",
"state_default",
"ban",
"kick",
"redact",
)
elif event_type == EventTypes.Aliases:
add_fields("aliases")
allowed_fields = {
k: v
for k, v in event.get_dict().items()
if k in allowed_keys
}
allowed_fields["content"] = new_content
allowed_fields["unsigned"] = {}
if "age_ts" in event.unsigned:
allowed_fields["unsigned"]["age_ts"] = event.unsigned["age_ts"]
return type(event)(allowed_fields)
def serialize_event(hs, e, client_event=True):
# FIXME(erikj): To handle the case of presence events and the like
if not isinstance(e, EventBase):
return e
# Should this strip out None's?
d = {k: v for k, v in e.get_dict().items()}
if not client_event:
# set the age and keep all other keys
if "age_ts" in d["unsigned"]:
now = int(hs.get_clock().time_msec())
d["unsigned"]["age"] = now - d["unsigned"]["age_ts"]
return d
if "age_ts" in d["unsigned"]:
now = int(hs.get_clock().time_msec())
d["age"] = now - d["unsigned"]["age_ts"]
del d["unsigned"]["age_ts"]
d["user_id"] = d.pop("sender", None)
if "redacted_because" in e.unsigned:
d["redacted_because"] = serialize_event(
hs, e.unsigned["redacted_because"]
)
del d["unsigned"]["redacted_because"]
if "redacted_by" in e.unsigned:
d["redacted_by"] = e.unsigned["redacted_by"]
del d["unsigned"]["redacted_by"]
if "replaces_state" in e.unsigned:
d["replaces_state"] = e.unsigned["replaces_state"]
del d["unsigned"]["replaces_state"]
if "prev_content" in e.unsigned:
d["prev_content"] = e.unsigned["prev_content"]
del d["unsigned"]["prev_content"]
del d["auth_events"]
del d["prev_events"]
del d["hashes"]
del d["signatures"]
d.pop("depth", None)
d.pop("unsigned", None)
d.pop("origin", None)
return d
|
