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101
synapse/federation/pdu_codec.py
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101
synapse/federation/pdu_codec.py
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# -*- coding: utf-8 -*-
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# Copyright 2014 matrix.org
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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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from .units import Pdu
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import copy
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def decode_event_id(event_id, server_name):
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parts = event_id.split("@")
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if len(parts) < 2:
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return (event_id, server_name)
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else:
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return (parts[0], "".join(parts[1:]))
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def encode_event_id(pdu_id, origin):
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return "%s@%s" % (pdu_id, origin)
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class PduCodec(object):
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def __init__(self, hs):
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self.server_name = hs.hostname
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self.event_factory = hs.get_event_factory()
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self.clock = hs.get_clock()
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def event_from_pdu(self, pdu):
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kwargs = {}
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kwargs["event_id"] = encode_event_id(pdu.pdu_id, pdu.origin)
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kwargs["room_id"] = pdu.context
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kwargs["etype"] = pdu.pdu_type
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kwargs["prev_events"] = [
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encode_event_id(p[0], p[1]) for p in pdu.prev_pdus
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]
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if hasattr(pdu, "prev_state_id") and hasattr(pdu, "prev_state_origin"):
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kwargs["prev_state"] = encode_event_id(
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pdu.prev_state_id, pdu.prev_state_origin
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)
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kwargs.update({
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k: v
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for k, v in pdu.get_full_dict().items()
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if k not in [
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"pdu_id",
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"context",
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"pdu_type",
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"prev_pdus",
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"prev_state_id",
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"prev_state_origin",
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]
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})
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return self.event_factory.create_event(**kwargs)
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def pdu_from_event(self, event):
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d = event.get_full_dict()
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d["pdu_id"], d["origin"] = decode_event_id(
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event.event_id, self.server_name
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)
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d["context"] = event.room_id
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d["pdu_type"] = event.type
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if hasattr(event, "prev_events"):
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d["prev_pdus"] = [
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decode_event_id(e, self.server_name)
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for e in event.prev_events
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]
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if hasattr(event, "prev_state"):
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d["prev_state_id"], d["prev_state_origin"] = (
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decode_event_id(event.prev_state, self.server_name)
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)
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if hasattr(event, "state_key"):
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d["is_state"] = True
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kwargs = copy.deepcopy(event.unrecognized_keys)
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kwargs.update({
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k: v for k, v in d.items()
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if k not in ["event_id", "room_id", "type", "prev_events"]
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})
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if "ts" not in kwargs:
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kwargs["ts"] = int(self.clock.time_msec())
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return Pdu(**kwargs)
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