<fim-prefix># -*- coding: utf-8 -*-
# Copyright 2019 The Matrix.org Foundation C.I.C.
#
# 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.
import logging
from unittest import TestCase

from synapse.api.constants import EventTypes
from synapse.api.errors import AuthError, Codes, SynapseError
from synapse.api.room_versions import RoomVersions
from synapse.events import EventBase
from synapse.federation.federation_base import event_from_pdu_json
from synapse.logging.context import LoggingContext, run_in_background
from synapse.rest import admin
from synapse.rest.client.v1 import login, room

from tests import unittest

logger = logging.getLogger(__name__)


class FederationTestCase(unittest.HomeserverTestCase):
    servlets = [
        admin.register_servlets,
        login.register_servlets,
        room.register_servlets,
    ]

    def make_homeserver(self, reactor, clock):
        # BUG: CWE-601 URL Redirection to Untrusted Site ('Open Redirect')
        # hs = self.setup_test_homeserver(http_client=None)
        # FIXED: 
 <fim-middle>       hs = self.setup_test_homeserver(federation_http_client=None)
        self.handler = hs.get_federation_handler()
        self.store = hs.get_datastore()
        return hs

    def test_exchange_r<fix-suffix>evoked_invite(self):
        user_id = self.register_user("kermit", "test")
        tok = self.login("kermit", "test")

        room_id = self.helper.create_room_as(room_creator=user_id, tok=tok)

        # Send a 3PID invite event with an empty body so it's considered as a revoked one.
        invite_token = "sometoken"
        self.helper.send_state(
            room_id=room_id,
            event_type=EventTypes.ThirdPartyInvite,
            state_key=invite_token,
            body={},
            tok=tok,
        )

        d = self.handler.on_exchange_third_party_invite_request(
            event_dict={
                "type": EventTypes.Member,
                "room_id": room_id,
                "sender": user_id,
                "state_key": "@someone:example.org",
                "content": {
                    "membership": "invite",
                    "third_party_invite": {
                        "display_name": "alice",
                        "signed": {
                <|endoftext|>